├── 0001-two-sum ├── 0001-two-sum.cpp ├── 0001-two-sum.java ├── NOTES.md └── README.md ├── 0003-longest-substring-without-repeating-characters ├── 0003-longest-substring-without-repeating-characters.java └── README.md ├── 0005-longest-palindromic-substring ├── 0005-longest-palindromic-substring.java ├── NOTES.md └── README.md ├── 0009-palindrome-number ├── 0009-palindrome-number.java └── NOTES.md ├── 0011-container-with-most-water ├── 0011-container-with-most-water.java ├── NOTES.md └── README.md ├── 0013-roman-to-integer ├── 0013-roman-to-integer.java ├── NOTES.md └── README.md ├── 0014-longest-common-prefix ├── 0014-longest-common-prefix.java ├── NOTES.md └── README.md ├── 0015-3sum ├── 0015-3sum.java └── README.md ├── 0016-3sum-closest ├── 0016-3sum-closest.java └── README.md ├── 0020-valid-parentheses ├── 0020-valid-parentheses.java └── README.md ├── 0021-merge-two-sorted-lists ├── 0021-merge-two-sorted-lists.java └── README.md ├── 0023-merge-k-sorted-lists ├── 0023-merge-k-sorted-lists.java └── README.md ├── 0024-swap-nodes-in-pairs ├── 0024-swap-nodes-in-pairs.java ├── NOTES.md └── README.md ├── 0025-reverse-nodes-in-k-group ├── 0025-reverse-nodes-in-k-group.java └── README.md ├── 0028-find-the-index-of-the-first-occurrence-in-a-string ├── 0028-find-the-index-of-the-first-occurrence-in-a-string.java ├── NOTES.md └── README.md ├── 0029-divide-two-integers ├── 0029-divide-two-integers.java └── README.md ├── 0032-longest-valid-parentheses ├── 0032-longest-valid-parentheses.java ├── NOTES.md └── README.md ├── 0033-search-in-rotated-sorted-array ├── 0033-search-in-rotated-sorted-array.java └── README.md ├── 0034-find-first-and-last-position-of-element-in-sorted-array ├── 0034-find-first-and-last-position-of-element-in-sorted-array.java └── README.md ├── 0038-count-and-say ├── 0038-count-and-say.java └── README.md ├── 0039-combination-sum ├── 0039-combination-sum.java ├── 0039-combination-sum.py └── README.md ├── 0040-combination-sum-ii ├── 0040-combination-sum-ii.py └── README.md ├── 0045-jump-game-ii ├── 0045-jump-game-ii.java └── README.md ├── 0046-permutations ├── 0046-permutations.java └── README.md ├── 0048-rotate-image ├── 0048-rotate-image.java └── README.md ├── 0049-group-anagrams ├── 0049-group-anagrams.java └── README.md ├── 0050-powx-n ├── 0050-powx-n.java ├── NOTES.md └── README.md ├── 0053-maximum-subarray ├── 0053-maximum-subarray.java └── README.md ├── 0055-jump-game ├── 0055-jump-game.java └── README.md ├── 0056-merge-intervals ├── 0056-merge-intervals.java └── README.md ├── 0057-insert-interval ├── 0057-insert-interval.java └── README.md ├── 0058-length-of-last-word ├── 0058-length-of-last-word.java ├── NOTES.md └── README.md ├── 0061-rotate-list ├── 0061-rotate-list.java ├── NOTES.md └── README.md ├── 0062-unique-paths ├── 0062-unique-paths.java └── README.md ├── 0063-unique-paths-ii ├── 0063-unique-paths-ii.java └── README.md ├── 0064-minimum-path-sum ├── 0064-minimum-path-sum.java └── README.md ├── 0069-sqrtx ├── 0069-sqrtx.java └── README.md ├── 0070-climbing-stairs ├── 0070-climbing-stairs.java └── README.md ├── 0073-set-matrix-zeroes ├── 0073-set-matrix-zeroes.java ├── NOTES.md └── README.md ├── 0075-sort-colors ├── 0075-sort-colors.java └── README.md ├── 0076-minimum-window-substring ├── 0076-minimum-window-substring.java └── README.md ├── 0078-subsets ├── 0078-subsets.java ├── 0078-subsets.py └── README.md ├── 0082-remove-duplicates-from-sorted-list-ii ├── 0082-remove-duplicates-from-sorted-list-ii.cpp └── README.md ├── 0083-remove-duplicates-from-sorted-list ├── 0083-remove-duplicates-from-sorted-list.java └── README.md ├── 0088-merge-sorted-array ├── 0088-merge-sorted-array.java ├── NOTES.md └── README.md ├── 0092-reverse-linked-list-ii ├── 0092-reverse-linked-list-ii.java └── README.md ├── 0094-binary-tree-inorder-traversal ├── 0094-binary-tree-inorder-traversal.java ├── 0094-binary-tree-inorder-traversal.py └── README.md ├── 0098-validate-binary-search-tree ├── 0098-validate-binary-search-tree.java ├── 0098-validate-binary-search-tree.py └── README.md ├── 0100-same-tree ├── 0100-same-tree.java ├── NOTES.md └── README.md ├── 0102-binary-tree-level-order-traversal ├── 0102-binary-tree-level-order-traversal.java └── README.md ├── 0103-binary-tree-zigzag-level-order-traversal ├── 0103-binary-tree-zigzag-level-order-traversal.java └── README.md ├── 0104-maximum-depth-of-binary-tree ├── 0104-maximum-depth-of-binary-tree.java └── README.md ├── 0106-construct-binary-tree-from-inorder-and-postorder-traversal ├── 0106-construct-binary-tree-from-inorder-and-postorder-traversal.cpp └── README.md ├── 0108-convert-sorted-array-to-binary-search-tree ├── 0108-convert-sorted-array-to-binary-search-tree.java └── README.md ├── 0110-balanced-binary-tree ├── 0110-balanced-binary-tree.java └── README.md ├── 0112-path-sum ├── 0112-path-sum.java └── README.md ├── 0114-flatten-binary-tree-to-linked-list ├── 0114-flatten-binary-tree-to-linked-list.java └── README.md ├── 0116-populating-next-right-pointers-in-each-node ├── 0116-populating-next-right-pointers-in-each-node.java └── README.md ├── 0118-pascals-triangle ├── 0118-pascals-triangle.java └── README.md ├── 0119-pascals-triangle-ii ├── 0119-pascals-triangle-ii.java ├── NOTES.md └── README.md ├── 0120-triangle ├── 0120-triangle.java └── README.md ├── 0121-best-time-to-buy-and-sell-stock ├── 0121-best-time-to-buy-and-sell-stock.java ├── 0121-best-time-to-buy-and-sell-stock.py ├── NOTES.md └── README.md ├── 0122-best-time-to-buy-and-sell-stock-ii ├── 0122-best-time-to-buy-and-sell-stock-ii.py └── README.md ├── 0123-best-time-to-buy-and-sell-stock-iii ├── 0123-best-time-to-buy-and-sell-stock-iii.py └── README.md ├── 0124-binary-tree-maximum-path-sum ├── 0124-binary-tree-maximum-path-sum.java └── README.md ├── 0125-valid-palindrome ├── 0125-valid-palindrome.java ├── NOTES.md └── README.md ├── 0128-longest-consecutive-sequence ├── 0128-longest-consecutive-sequence.java ├── 0128-longest-consecutive-sequence.py └── README.md ├── 0129-sum-root-to-leaf-numbers ├── 0129-sum-root-to-leaf-numbers.java └── README.md ├── 0131-palindrome-partitioning ├── 0131-palindrome-partitioning.py └── README.md ├── 0133-clone-graph ├── 0133-clone-graph.java └── README.md ├── 0134-gas-station ├── 0134-gas-station.java └── README.md ├── 0138-copy-list-with-random-pointer ├── 0138-copy-list-with-random-pointer.java ├── NOTES.md └── README.md ├── 0141-linked-list-cycle ├── 0141-linked-list-cycle.java ├── NOTES.md └── README.md ├── 0142-linked-list-cycle-ii ├── 0142-linked-list-cycle-ii.java └── README.md ├── 0143-reorder-list ├── 0143-reorder-list.java └── README.md ├── 0144-binary-tree-preorder-traversal ├── 0144-binary-tree-preorder-traversal.java ├── 0144-binary-tree-preorder-traversal.py └── README.md ├── 0145-binary-tree-postorder-traversal ├── 0145-binary-tree-postorder-traversal.java ├── NOTES.md └── README.md ├── 0146-lru-cache ├── 0146-lru-cache.java └── README.md ├── 0149-max-points-on-a-line ├── 0149-max-points-on-a-line.java ├── NOTES.md └── README.md ├── 0150-evaluate-reverse-polish-notation ├── 0150-evaluate-reverse-polish-notation.java ├── NOTES.md └── README.md ├── 0151-reverse-words-in-a-string ├── 0151-reverse-words-in-a-string.java ├── NOTES.md └── README.md ├── 0152-maximum-product-subarray ├── 0152-maximum-product-subarray.java └── README.md ├── 0153-find-minimum-in-rotated-sorted-array ├── 0153-find-minimum-in-rotated-sorted-array.java ├── 0153-find-minimum-in-rotated-sorted-array.py └── README.md ├── 0155-min-stack ├── 0155-min-stack.java ├── NOTES.md └── README.md ├── 0160-intersection-of-two-linked-lists ├── 0160-intersection-of-two-linked-lists.java └── README.md ├── 0162-find-peak-element ├── 0162-find-peak-element.java └── README.md ├── 0167-two-sum-ii-input-array-is-sorted ├── 0167-two-sum-ii-input-array-is-sorted.java ├── NOTES.md └── README.md ├── 0169-majority-element ├── 0169-majority-element.java ├── NOTES.md └── README.md ├── 0175-combine-two-tables ├── 0175-combine-two-tables.sql └── NOTES.md ├── 0176-second-highest-salary ├── 0176-second-highest-salary.sql └── README.md ├── 0177-nth-highest-salary └── README.md ├── 0179-largest-number ├── 0179-largest-number.java ├── NOTES.md └── README.md ├── 0187-repeated-dna-sequences ├── 0187-repeated-dna-sequences.java └── README.md ├── 0188-best-time-to-buy-and-sell-stock-iv ├── 0188-best-time-to-buy-and-sell-stock-iv.py └── README.md ├── 0189-rotate-array ├── 0189-rotate-array.java ├── NOTES.md └── README.md ├── 0191-number-of-1-bits ├── 0191-number-of-1-bits.java └── README.md ├── 0196-delete-duplicate-emails ├── 0196-delete-duplicate-emails.sql └── NOTES.md ├── 0198-house-robber ├── 0198-house-robber.java ├── 0198-house-robber.py └── README.md ├── 0199-binary-tree-right-side-view ├── 0199-binary-tree-right-side-view.java └── README.md ├── 0200-number-of-islands ├── 0200-number-of-islands.java └── README.md ├── 0201-bitwise-and-of-numbers-range ├── 0201-bitwise-and-of-numbers-range.java └── README.md ├── 0205-isomorphic-strings ├── 0205-isomorphic-strings.java ├── NOTES.md └── README.md ├── 0206-reverse-linked-list ├── 0206-reverse-linked-list.java ├── 0206-reverse-linked-list.py └── README.md ├── 0209-minimum-size-subarray-sum ├── 0209-minimum-size-subarray-sum.java └── README.md ├── 0213-house-robber-ii ├── 0213-house-robber-ii.java └── README.md ├── 0214-shortest-palindrome ├── 0214-shortest-palindrome.java ├── NOTES.md └── README.md ├── 0215-kth-largest-element-in-an-array ├── 0215-kth-largest-element-in-an-array.java ├── NOTES.md └── README.md ├── 0217-contains-duplicate ├── 0217-contains-duplicate.java └── README.md ├── 0225-implement-stack-using-queues ├── 0225-implement-stack-using-queues.java └── README.md ├── 0226-invert-binary-tree ├── 0226-invert-binary-tree.java └── README.md ├── 0229-majority-element-ii ├── 0229-majority-element-ii.java └── README.md ├── 0230-kth-smallest-element-in-a-bst ├── 0230-kth-smallest-element-in-a-bst.java └── README.md ├── 0232-implement-queue-using-stacks ├── 0232-implement-queue-using-stacks.java └── README.md ├── 0234-palindrome-linked-list ├── 0234-palindrome-linked-list.java └── README.md ├── 0235-lowest-common-ancestor-of-a-binary-search-tree ├── 0235-lowest-common-ancestor-of-a-binary-search-tree.java └── README.md ├── 0236-lowest-common-ancestor-of-a-binary-tree ├── 0236-lowest-common-ancestor-of-a-binary-tree.java └── README.md ├── 0237-delete-node-in-a-linked-list ├── 0237-delete-node-in-a-linked-list.java ├── NOTES.md └── README.md ├── 0238-product-of-array-except-self ├── 0238-product-of-array-except-self.java ├── NOTES.md └── README.md ├── 0239-sliding-window-maximum ├── 0239-sliding-window-maximum.java └── README.md ├── 0241-different-ways-to-add-parentheses ├── 0241-different-ways-to-add-parentheses.java ├── NOTES.md └── README.md ├── 0242-valid-anagram ├── 0242-valid-anagram.java ├── NOTES.md └── README.md ├── 0257-binary-tree-paths ├── 0257-binary-tree-paths.py └── README.md ├── 0268-missing-number ├── 0268-missing-number.java └── README.md ├── 0283-move-zeroes ├── 0283-move-zeroes.java ├── NOTES.md └── README.md ├── 0287-find-the-duplicate-number ├── 0287-find-the-duplicate-number.java └── README.md ├── 0300-longest-increasing-subsequence ├── 0300-longest-increasing-subsequence.java ├── NOTES.md └── README.md ├── 0303-range-sum-query-immutable ├── 0303-range-sum-query-immutable.java └── README.md ├── 0322-coin-change ├── 0322-coin-change.java └── README.md ├── 0326-power-of-three ├── 0326-power-of-three.java └── README.md ├── 0328-odd-even-linked-list ├── 0328-odd-even-linked-list.cpp └── README.md ├── 0334-increasing-triplet-subsequence ├── 0334-increasing-triplet-subsequence.java ├── NOTES.md └── README.md ├── 0337-house-robber-iii ├── 0337-house-robber-iii.java └── README.md ├── 0338-counting-bits ├── 0338-counting-bits.java └── README.md ├── 0342-power-of-four ├── 0342-power-of-four.java └── README.md ├── 0345-reverse-vowels-of-a-string ├── 0345-reverse-vowels-of-a-string.java └── README.md ├── 0347-top-k-frequent-elements ├── 0347-top-k-frequent-elements.java └── README.md ├── 0350-intersection-of-two-arrays-ii ├── 0350-intersection-of-two-arrays-ii.java ├── NOTES.md └── README.md ├── 0374-guess-number-higher-or-lower ├── 0374-guess-number-higher-or-lower.java └── README.md ├── 0380-insert-delete-getrandom-o1 └── README.md ├── 0386-lexicographical-numbers ├── 0386-lexicographical-numbers.java └── README.md ├── 0392-is-subsequence ├── 0392-is-subsequence.java ├── NOTES.md └── README.md ├── 0402-remove-k-digits ├── 0402-remove-k-digits.java └── README.md ├── 0404-sum-of-left-leaves ├── 0404-sum-of-left-leaves.java └── README.md ├── 0416-partition-equal-subset-sum ├── 0416-partition-equal-subset-sum.java └── README.md ├── 0424-longest-repeating-character-replacement ├── 0424-longest-repeating-character-replacement.java └── README.md ├── 0435-non-overlapping-intervals ├── 0435-non-overlapping-intervals.java └── README.md ├── 0440-k-th-smallest-in-lexicographical-order ├── NOTES.md └── README.md ├── 0443-string-compression ├── 0443-string-compression.java ├── NOTES.md └── README.md ├── 0450-delete-node-in-a-bst ├── 0450-delete-node-in-a-bst.py └── README.md ├── 0451-sort-characters-by-frequency ├── 0451-sort-characters-by-frequency.java └── README.md ├── 0452-minimum-number-of-arrows-to-burst-balloons ├── 0452-minimum-number-of-arrows-to-burst-balloons.java ├── NOTES.md └── README.md ├── 0480-sliding-window-median ├── 0480-sliding-window-median.java └── README.md ├── 0485-max-consecutive-ones ├── 0485-max-consecutive-ones.java └── README.md ├── 0503-next-greater-element-ii ├── 0503-next-greater-element-ii.java └── README.md ├── 0509-fibonacci-number ├── NOTES.md └── README.md ├── 0513-find-bottom-left-tree-value ├── 0513-find-bottom-left-tree-value.java └── README.md ├── 0515-find-largest-value-in-each-tree-row └── README.md ├── 0516-longest-palindromic-subsequence ├── 0516-longest-palindromic-subsequence.java └── README.md ├── 0525-contiguous-array ├── 0525-contiguous-array.java └── README.md ├── 0539-minimum-time-difference ├── 0539-minimum-time-difference.java ├── NOTES.md └── README.md ├── 0540-single-element-in-a-sorted-array ├── 0540-single-element-in-a-sorted-array.java └── README.md ├── 0542-01-matrix ├── 0542-01-matrix.py └── README.md ├── 0543-diameter-of-binary-tree ├── 0543-diameter-of-binary-tree.java └── README.md ├── 0560-subarray-sum-equals-k ├── 0560-subarray-sum-equals-k.java └── README.md ├── 0584-find-customer-referee ├── 0584-find-customer-referee.sql └── README.md ├── 0605-can-place-flowers ├── 0605-can-place-flowers.java ├── NOTES.md └── README.md ├── 0621-task-scheduler ├── 0621-task-scheduler.java ├── NOTES.md └── README.md ├── 0637-average-of-levels-in-binary-tree ├── 0637-average-of-levels-in-binary-tree.java └── README.md ├── 0643-maximum-average-subarray-i ├── 0643-maximum-average-subarray-i.java ├── NOTES.md └── README.md ├── 0713-subarray-product-less-than-k ├── 0713-subarray-product-less-than-k.java └── README.md ├── 0724-find-pivot-index ├── 0724-find-pivot-index.java ├── NOTES.md └── README.md ├── 0725-split-linked-list-in-parts ├── 0725-split-linked-list-in-parts.java └── README.md ├── 0735-asteroid-collision ├── 0735-asteroid-collision.java └── README.md ├── 0739-daily-temperatures ├── 0739-daily-temperatures.java └── README.md ├── 0763-partition-labels ├── 0763-partition-labels.java ├── NOTES.md └── README.md ├── 0768-partition-labels ├── 0768-partition-labels.java └── README.md ├── 0783-search-in-a-binary-search-tree ├── 0783-search-in-a-binary-search-tree.py └── README.md ├── 0784-insert-into-a-binary-search-tree ├── 0784-insert-into-a-binary-search-tree.java ├── 0784-insert-into-a-binary-search-tree.py └── README.md ├── 0820-find-eventual-safe-states ├── 0820-find-eventual-safe-states.java └── README.md ├── 0838-design-linked-list ├── 0838-design-linked-list.java └── README.md ├── 0844-backspace-string-compare ├── 0844-backspace-string-compare.java ├── NOTES.md └── README.md ├── 0872-leaf-similar-trees ├── 0872-leaf-similar-trees.java ├── NOTES.md └── README.md ├── 0884-uncommon-words-from-two-sentences ├── 0884-uncommon-words-from-two-sentences.java ├── NOTES.md └── README.md ├── 0894-all-possible-full-binary-trees ├── 0894-all-possible-full-binary-trees.java ├── NOTES.md └── README.md ├── 0907-koko-eating-bananas ├── 0907-koko-eating-bananas.java └── README.md ├── 0908-middle-of-the-linked-list ├── 0908-middle-of-the-linked-list.java └── README.md ├── 0925-construct-binary-tree-from-preorder-and-postorder-traversal ├── 0925-construct-binary-tree-from-preorder-and-postorder-traversal.java └── README.md ├── 0926-flip-string-to-monotone-increasing ├── 0926-flip-string-to-monotone-increasing.java ├── NOTES.md └── README.md ├── 0937-online-stock-span ├── 0937-online-stock-span.java └── README.md ├── 0944-delete-columns-to-make-sorted ├── 0944-delete-columns-to-make-sorted.java ├── NOTES.md └── README.md ├── 0954-maximum-sum-circular-subarray ├── 0954-maximum-sum-circular-subarray.java └── README.md ├── 0966-binary-subarrays-with-sum ├── 0966-binary-subarrays-with-sum.java └── README.md ├── 0967-minimum-falling-path-sum ├── 0967-minimum-falling-path-sum.java └── README.md ├── 0988-flip-equivalent-binary-trees ├── 0988-flip-equivalent-binary-trees.java └── README.md ├── 0997-find-the-town-judge ├── NOTES.md └── README.md ├── 1-two-sum ├── 1-two-sum.java ├── NOTES.md └── README.md ├── 1004-max-consecutive-ones-iii ├── 1004-max-consecutive-ones-iii.java ├── NOTES.md └── README.md ├── 1008-construct-binary-search-tree-from-preorder-traversal ├── 1008-construct-binary-search-tree-from-preorder-traversal.java ├── NOTES.md └── README.md ├── 1009-complement-of-base-10-integer ├── 1009-complement-of-base-10-integer.java ├── NOTES.md └── README.md ├── 101-symmetric-tree ├── 101-symmetric-tree.java ├── NOTES.md └── README.md ├── 1014-k-closest-points-to-origin ├── 1014-k-closest-points-to-origin.java └── README.md ├── 1019-next-greater-node-in-linked-list ├── 1019-next-greater-node-in-linked-list.java ├── NOTES.md └── README.md ├── 102-binary-tree-level-order-traversal ├── 102-binary-tree-level-order-traversal.java ├── NOTES.md └── README.md ├── 1022-sum-of-root-to-leaf-binary-numbers ├── 1022-sum-of-root-to-leaf-binary-numbers.java ├── NOTES.md └── README.md ├── 1026-maximum-difference-between-node-and-ancestor ├── 1026-maximum-difference-between-node-and-ancestor.java ├── NOTES.md └── README.md ├── 1029-vertical-order-traversal-of-a-binary-tree ├── 1029-vertical-order-traversal-of-a-binary-tree.java └── README.md ├── 103-binary-tree-zigzag-level-order-traversal ├── 103-binary-tree-zigzag-level-order-traversal.java ├── NOTES.md └── README.md ├── 1030-smallest-string-starting-from-leaf ├── 1030-smallest-string-starting-from-leaf.java └── README.md ├── 1034-subarrays-with-k-different-integers └── README.md ├── 1038-binary-search-tree-to-greater-sum-tree ├── 1038-binary-search-tree-to-greater-sum-tree.java ├── NOTES.md └── README.md ├── 104-maximum-depth-of-binary-tree ├── 104-maximum-depth-of-binary-tree.java ├── NOTES.md └── README.md ├── 105-construct-binary-tree-from-preorder-and-inorder-traversal ├── 105-construct-binary-tree-from-preorder-and-inorder-traversal.java ├── NOTES.md └── README.md ├── 1050-construct-binary-search-tree-from-preorder-traversal ├── 1050-construct-binary-search-tree-from-preorder-traversal.java └── README.md ├── 1056-capacity-to-ship-packages-within-d-days ├── 1056-capacity-to-ship-packages-within-d-days.java └── README.md ├── 106-construct-binary-tree-from-inorder-and-postorder-traversal ├── 106-construct-binary-tree-from-inorder-and-postorder-traversal.java ├── NOTES.md └── README.md ├── 1061-lexicographically-smallest-equivalent-string ├── 1061-lexicographically-smallest-equivalent-string.java └── README.md ├── 107-binary-tree-level-order-traversal-ii ├── 107-binary-tree-level-order-traversal-ii.java ├── NOTES.md └── README.md ├── 1071-greatest-common-divisor-of-strings ├── 1071-greatest-common-divisor-of-strings.java ├── NOTES.md └── README.md ├── 1081-smallest-subsequence-of-distinct-characters ├── 1081-smallest-subsequence-of-distinct-characters.java ├── NOTES.md └── README.md ├── 1089-duplicate-zeros ├── 1089-duplicate-zeros.java └── README.md ├── 1093-recover-a-tree-from-preorder-traversal ├── 1093-recover-a-tree-from-preorder-traversal.java └── README.md ├── 11-container-with-most-water ├── 11-container-with-most-water.java ├── NOTES.md └── README.md ├── 1110-delete-nodes-and-return-forest ├── 1110-delete-nodes-and-return-forest.java ├── NOTES.md └── README.md ├── 1122-relative-sort-array ├── 1122-relative-sort-array.java ├── NOTES.md └── README.md ├── 1137-n-th-tribonacci-number ├── 1137-n-th-tribonacci-number.java ├── NOTES.md └── README.md ├── 1143-longest-common-subsequence ├── 1143-longest-common-subsequence.java ├── NOTES.md └── README.md ├── 1153-product-sales-analysis-i └── README.md ├── 116-populating-next-right-pointers-in-each-node ├── 116-populating-next-right-pointers-in-each-node.java ├── NOTES.md └── README.md ├── 1160-find-words-that-can-be-formed-by-characters ├── 1160-find-words-that-can-be-formed-by-characters.java ├── NOTES.md └── README.md ├── 1161-maximum-level-sum-of-a-binary-tree ├── 1161-maximum-level-sum-of-a-binary-tree.java ├── NOTES.md └── README.md ├── 117-populating-next-right-pointers-in-each-node-ii ├── 117-populating-next-right-pointers-in-each-node-ii.java ├── NOTES.md └── README.md ├── 1170-shortest-common-supersequence ├── 1170-shortest-common-supersequence.java └── README.md ├── 1171-remove-zero-sum-consecutive-nodes-from-linked-list ├── 1171-remove-zero-sum-consecutive-nodes-from-linked-list.java ├── NOTES.md └── README.md ├── 118-pascals-triangle ├── 118-pascals-triangle.java ├── NOTES.md └── README.md ├── 1190-reverse-substrings-between-each-pair-of-parentheses └── 1190-reverse-substrings-between-each-pair-of-parentheses.java ├── 1207-unique-number-of-occurrences ├── 1207-unique-number-of-occurrences.java ├── NOTES.md └── README.md ├── 121-best-time-to-buy-and-sell-stock ├── 121-best-time-to-buy-and-sell-stock.java ├── NOTES.md └── README.md ├── 1224-minimum-falling-path-sum-ii ├── 1224-minimum-falling-path-sum-ii.java └── README.md ├── 1249-minimum-remove-to-make-valid-parentheses ├── 1249-minimum-remove-to-make-valid-parentheses.java └── README.md ├── 1250-longest-common-subsequence ├── 1250-longest-common-subsequence.java └── README.md ├── 1258-article-views-i ├── 1258-article-views-i.sql └── README.md ├── 1261-find-elements-in-a-contaminated-binary-tree ├── 1261-find-elements-in-a-contaminated-binary-tree.java ├── NOTES.md └── README.md ├── 1266-minimum-time-visiting-all-points ├── 1266-minimum-time-visiting-all-points.java └── README.md ├── 128-longest-consecutive-sequence ├── 128-longest-consecutive-sequence.java └── NOTES.md ├── 1287-element-appearing-more-than-25-in-sorted-array ├── 1287-element-appearing-more-than-25-in-sorted-array.java ├── NOTES.md └── README.md ├── 129-sum-root-to-leaf-numbers ├── 129-sum-root-to-leaf-numbers.java ├── NOTES.md └── README.md ├── 1291-sequential-digits ├── 1291-sequential-digits.java ├── NOTES.md └── README.md ├── 1296-divide-array-in-sets-of-k-consecutive-numbers ├── 1296-divide-array-in-sets-of-k-consecutive-numbers.java ├── NOTES.md └── README.md ├── 1299-replace-elements-with-greatest-element-on-right-side ├── 1299-replace-elements-with-greatest-element-on-right-side.java ├── NOTES.md └── README.md ├── 1302-deepest-leaves-sum ├── 1302-deepest-leaves-sum.java ├── NOTES.md └── README.md ├── 1305-all-elements-in-two-binary-search-trees ├── 1305-all-elements-in-two-binary-search-trees.java ├── NOTES.md └── README.md ├── 1310-xor-queries-of-a-subarray ├── 1310-xor-queries-of-a-subarray.java └── README.md ├── 1315-sum-of-nodes-with-even-valued-grandparent ├── 1315-sum-of-nodes-with-even-valued-grandparent.java └── NOTES.md ├── 1331-rank-transform-of-an-array ├── 1331-rank-transform-of-an-array.java ├── NOTES.md └── README.md ├── 1335-maximum-candies-allocated-to-k-children ├── 1335-maximum-candies-allocated-to-k-children.java └── README.md ├── 134-gas-station ├── 134-gas-station.java ├── NOTES.md └── README.md ├── 136-single-number ├── 136-single-number.java ├── NOTES.md └── README.md ├── 1367-linked-list-in-binary-tree ├── 1367-linked-list-in-binary-tree.java ├── NOTES.md └── README.md ├── 1371-find-the-longest-substring-containing-vowels-in-even-counts ├── 1371-find-the-longest-substring-containing-vowels-in-even-counts.java └── README.md ├── 1373-maximum-sum-bst-in-binary-tree ├── 1373-maximum-sum-bst-in-binary-tree.java ├── NOTES.md └── README.md ├── 13745-606-153-find-minimum-in-rotated-sorted-array ├── 13745-606-153-find-minimum-in-rotated-sorted-array.py └── README.md ├── 138-copy-list-with-random-pointer ├── 138-copy-list-with-random-pointer.java ├── NOTES.md └── README.md ├── 1387-find-elements-in-a-contaminated-binary-tree ├── 1387-find-elements-in-a-contaminated-binary-tree.java └── README.md ├── 1390-four-divisors ├── 1390-four-divisors.java ├── NOTES.md └── README.md ├── 14-longest-common-prefix ├── 14-longest-common-prefix.java ├── NOTES.md └── README.md ├── 141-linked-list-cycle ├── 141-linked-list-cycle.java └── NOTES.md ├── 1414-find-the-minimum-number-of-fibonacci-numbers-whose-sum-is-k ├── 1414-find-the-minimum-number-of-fibonacci-numbers-whose-sum-is-k.java └── NOTES.md ├── 142-linked-list-cycle-ii ├── 142-linked-list-cycle-ii.java ├── NOTES.md └── README.md ├── 1421-find-numbers-with-even-number-of-digits ├── 1421-find-numbers-with-even-number-of-digits.java └── README.md ├── 1431-kids-with-the-greatest-number-of-candies ├── 1431-kids-with-the-greatest-number-of-candies.java ├── NOTES.md └── README.md ├── 1441-build-an-array-with-stack-operations ├── 1441-build-an-array-with-stack-operations.java └── NOTES.md ├── 1443-minimum-time-to-collect-all-apples-in-a-tree ├── 1443-minimum-time-to-collect-all-apples-in-a-tree.java ├── NOTES.md └── README.md ├── 1448-count-good-nodes-in-binary-tree ├── 1448-count-good-nodes-in-binary-tree.java ├── NOTES.md └── README.md ├── 1451-rearrange-words-in-a-sentence ├── 1451-rearrange-words-in-a-sentence.java ├── NOTES.md └── README.md ├── 1456-maximum-number-of-vowels-in-a-substring-of-given-length ├── 1456-maximum-number-of-vowels-in-a-substring-of-given-length.java ├── NOTES.md └── README.md ├── 1460-number-of-substrings-containing-all-three-characters ├── 1460-number-of-substrings-containing-all-three-characters.java └── README.md ├── 147-insertion-sort-list ├── 147-insertion-sort-list.java ├── NOTES.md └── README.md ├── 1476-subrectangle-queries ├── 1476-subrectangle-queries.java ├── NOTES.md └── README.md ├── 148-sort-list ├── 148-sort-list.java ├── NOTES.md └── README.md ├── 1480-running-sum-of-1d-array ├── 1480-running-sum-of-1d-array.java ├── NOTES.md └── README.md ├── 1491-average-salary-excluding-the-minimum-and-maximum-salary ├── 1491-average-salary-excluding-the-minimum-and-maximum-salary.java ├── NOTES.md └── README.md ├── 1493-longest-subarray-of-1s-after-deleting-one-element ├── 1493-longest-subarray-of-1s-after-deleting-one-element.java ├── NOTES.md └── README.md ├── 1497-check-if-array-pairs-are-divisible-by-k ├── 1497-check-if-array-pairs-are-divisible-by-k.java ├── NOTES.md └── README.md ├── 150-evaluate-reverse-polish-notation ├── 150-evaluate-reverse-polish-notation.java ├── NOTES.md └── README.md ├── 1508-range-sum-of-sorted-subarray-sums ├── 1508-range-sum-of-sorted-subarray-sums.java ├── NOTES.md └── README.md ├── 1509-minimum-difference-between-largest-and-smallest-value-in-three-moves ├── 1509-minimum-difference-between-largest-and-smallest-value-in-three-moves.java └── NOTES.md ├── 1509-replace-employee-id-with-the-unique-identifier ├── 1509-replace-employee-id-with-the-unique-identifier.sql └── README.md ├── 1518-water-bottles ├── 1518-water-bottles.java ├── NOTES.md └── README.md ├── 1519-number-of-nodes-in-the-sub-tree-with-the-same-label ├── 1519-number-of-nodes-in-the-sub-tree-with-the-same-label.java └── NOTES.md ├── 155-min-stack ├── 155-min-stack.java ├── NOTES.md └── README.md ├── 1550-three-consecutive-odds ├── 1550-three-consecutive-odds.java ├── NOTES.md └── README.md ├── 1582-special-positions-in-a-binary-matrix ├── 1582-special-positions-in-a-binary-matrix.java ├── NOTES.md └── README.md ├── 1598-crawler-log-folder ├── 1598-crawler-log-folder.java ├── NOTES.md └── README.md ├── 160-intersection-of-two-linked-lists ├── 160-intersection-of-two-linked-lists.java └── NOTES.md ├── 1609-even-odd-tree ├── 1609-even-odd-tree.java ├── NOTES.md └── README.md ├── 162-find-peak-element ├── 162-find-peak-element.java ├── NOTES.md └── README.md ├── 1631-number-of-sub-arrays-with-odd-sum ├── 1631-number-of-sub-arrays-with-odd-sum.java └── README.md ├── 1642-water-bottles ├── 1642-water-bottles.java └── README.md ├── 1652-minimum-suffix-flips ├── 1652-minimum-suffix-flips.py └── README.md ├── 1662-check-if-two-string-arrays-are-equivalent ├── 1662-check-if-two-string-arrays-are-equivalent.java ├── NOTES.md └── README.md ├── 167-two-sum-ii-input-array-is-sorted ├── 167-two-sum-ii-input-array-is-sorted.java ├── NOTES.md └── README.md ├── 1672-richest-customer-wealth ├── 1672-richest-customer-wealth.java ├── NOTES.md └── README.md ├── 1679-max-number-of-k-sum-pairs ├── 1679-max-number-of-k-sum-pairs.java ├── NOTES.md └── README.md ├── 1684-count-the-number-of-consistent-strings ├── 1684-count-the-number-of-consistent-strings.java ├── NOTES.md └── README.md ├── 1689-partitioning-into-minimum-number-of-deci-binary-numbers ├── 1689-partitioning-into-minimum-number-of-deci-binary-numbers.java ├── NOTES.md └── README.md ├── 169-majority-element ├── 169-majority-element.java ├── NOTES.md └── README.md ├── 17-letter-combinations-of-a-phone-number ├── 17-letter-combinations-of-a-phone-number.java ├── NOTES.md └── README.md ├── 1701-average-waiting-time ├── 1701-average-waiting-time.java ├── NOTES.md └── README.md ├── 1710-maximum-units-on-a-truck ├── 1710-maximum-units-on-a-truck.java ├── NOTES.md └── README.md ├── 1717-maximum-score-from-removing-substrings ├── 1717-maximum-score-from-removing-substrings.java └── README.md ├── 172-factorial-trailing-zeroes ├── 172-factorial-trailing-zeroes.java ├── NOTES.md └── README.md ├── 1721-swapping-nodes-in-a-linked-list ├── 1721-swapping-nodes-in-a-linked-list.java ├── NOTES.md └── README.md ├── 1724-customer-who-visited-but-did-not-make-any-transactions ├── 1724-customer-who-visited-but-did-not-make-any-transactions.sql └── README.md ├── 173-binary-search-tree-iterator ├── 173-binary-search-tree-iterator.java └── NOTES.md ├── 1732-find-the-highest-altitude ├── 1732-find-the-highest-altitude.java ├── NOTES.md └── README.md ├── 1768-merge-strings-alternately ├── 1768-merge-strings-alternately.java ├── NOTES.md └── README.md ├── 1791-find-center-of-star-graph ├── 1791-find-center-of-star-graph.java └── README.md ├── 1817-finding-the-users-active-minutes ├── 1817-finding-the-users-active-minutes.java ├── NOTES.md └── README.md ├── 182-duplicate-emails ├── 182-duplicate-emails.sql ├── NOTES.md └── README.md ├── 1822-sign-of-the-product-of-an-array ├── 1822-sign-of-the-product-of-an-array.java ├── NOTES.md └── README.md ├── 1823-find-the-winner-of-the-circular-game ├── 1823-find-the-winner-of-the-circular-game.java ├── NOTES.md └── README.md ├── 1827-invalid-tweets ├── 1827-invalid-tweets.sql └── README.md ├── 1833-maximum-ice-cream-bars ├── 1833-maximum-ice-cream-bars.java ├── NOTES.md └── README.md ├── 1845-seat-reservation-manager ├── 1845-seat-reservation-manager.java ├── NOTES.md └── README.md ├── 1846-maximum-element-after-decreasing-and-rearranging ├── 1846-maximum-element-after-decreasing-and-rearranging.java └── README.md ├── 1849-maximum-absolute-sum-of-any-subarray ├── 1849-maximum-absolute-sum-of-any-subarray.java └── README.md ├── 1889-check-if-number-is-a-sum-of-powers-of-three ├── 1889-check-if-number-is-a-sum-of-powers-of-three.java └── README.md ├── 19-remove-nth-node-from-end-of-list ├── 19-remove-nth-node-from-end-of-list.java └── NOTES.md ├── 1908-recyclable-and-low-fat-products ├── 1908-recyclable-and-low-fat-products.sql └── README.md ├── 1920-build-array-from-permutation ├── 1920-build-array-from-permutation.py └── README.md ├── 1945-sum-of-digits-of-string-after-convert ├── 1945-sum-of-digits-of-string-after-convert.java └── README.md ├── 1979-find-greatest-common-divisor-of-array ├── 1979-find-greatest-common-divisor-of-array.java ├── NOTES.md └── README.md ├── 198-house-robber ├── 198-house-robber.java ├── NOTES.md └── README.md ├── 1983-maximum-population-year ├── 1983-maximum-population-year.java └── README.md ├── 199-binary-tree-right-side-view ├── 199-binary-tree-right-side-view.java ├── NOTES.md └── README.md ├── 1991-find-the-middle-index-in-array ├── 1991-find-the-middle-index-in-array.java ├── NOTES.md └── README.md ├── 2-add-two-numbers ├── 2-add-two-numbers.java └── NOTES.md ├── 20-valid-parentheses ├── 20-valid-parentheses.java ├── NOTES.md └── README.md ├── 2000-reverse-prefix-of-word ├── 2000-reverse-prefix-of-word.java ├── NOTES.md └── README.md ├── 202-happy-number ├── 202-happy-number.java └── NOTES.md ├── 2021-remove-all-occurrences-of-a-substring ├── 2021-remove-all-occurrences-of-a-substring.java └── README.md ├── 2048-build-array-from-permutation ├── 2048-build-array-from-permutation.java └── README.md ├── 2058-find-the-minimum-and-maximum-number-of-nodes-between-critical-points ├── 2058-find-the-minimum-and-maximum-number-of-nodes-between-critical-points.java └── README.md ├── 2085-count-common-words-with-one-occurrence ├── 2085-count-common-words-with-one-occurrence.java └── README.md ├── 2089-find-target-indices-after-sorting-array ├── 2089-find-target-indices-after-sorting-array.java └── NOTES.md ├── 2090-number-of-ways-to-arrive-at-destination ├── 2090-number-of-ways-to-arrive-at-destination.java └── README.md ├── 2091-removing-minimum-and-maximum-from-array ├── 2091-removing-minimum-and-maximum-from-array.java ├── NOTES.md └── README.md ├── 21-merge-two-sorted-lists ├── 21-merge-two-sorted-lists.java └── NOTES.md ├── 2107-find-unique-binary-string ├── 2107-find-unique-binary-string.java └── README.md ├── 2131-longest-palindrome-by-concatenating-two-letter-words ├── 2131-longest-palindrome-by-concatenating-two-letter-words.java ├── NOTES.md └── README.md ├── 2133-check-if-every-row-and-column-contains-all-numbers ├── 2133-check-if-every-row-and-column-contains-all-numbers.java ├── NOTES.md └── README.md ├── 2138-divide-a-string-into-groups-of-size-k ├── 2138-divide-a-string-into-groups-of-size-k.java └── README.md ├── 2139-minimum-moves-to-reach-target-score ├── 2139-minimum-moves-to-reach-target-score.java ├── NOTES.md └── README.md ├── 2148-count-elements-with-strictly-smaller-and-greater-elements ├── 2148-count-elements-with-strictly-smaller-and-greater-elements.java ├── NOTES.md └── README.md ├── 2149-rearrange-array-elements-by-sign ├── 2149-rearrange-array-elements-by-sign.java ├── NOTES.md └── README.md ├── 215-kth-largest-element-in-an-array ├── 215-kth-largest-element-in-an-array.java ├── NOTES.md └── README.md ├── 2150-find-all-lonely-numbers-in-the-array ├── 2150-find-all-lonely-numbers-in-the-array.java ├── NOTES.md └── README.md ├── 2154-keep-multiplying-found-values-by-two ├── 2154-keep-multiplying-found-values-by-two.java └── README.md ├── 2160-minimum-operations-to-make-a-uni-value-grid ├── 2160-minimum-operations-to-make-a-uni-value-grid.java └── README.md ├── 2160-minimum-sum-of-four-digit-number-after-splitting-digits ├── 2160-minimum-sum-of-four-digit-number-after-splitting-digits.java ├── NOTES.md └── README.md ├── 2161-partition-array-according-to-given-pivot ├── 2161-partition-array-according-to-given-pivot.java └── README.md ├── 2164-sort-even-and-odd-indices-independently ├── 2164-sort-even-and-odd-indices-independently.java ├── NOTES.md └── README.md ├── 2165-smallest-value-of-the-rearranged-number ├── 2165-smallest-value-of-the-rearranged-number.java ├── NOTES.md └── README.md ├── 2166-design-bitset ├── 2166-design-bitset.java ├── NOTES.md └── README.md ├── 2174-next-greater-numerically-balanced-number ├── 2174-next-greater-numerically-balanced-number.java └── README.md ├── 2177-find-three-consecutive-integers-that-sum-to-a-given-number ├── 2177-find-three-consecutive-integers-that-sum-to-a-given-number.java ├── NOTES.md └── README.md ├── 2180-count-integers-with-even-digit-sum ├── 2180-count-integers-with-even-digit-sum.java └── README.md ├── 2181-merge-nodes-in-between-zeros ├── 2181-merge-nodes-in-between-zeros.java ├── NOTES.md └── README.md ├── 2183-count-array-pairs-divisible-by-k ├── 2183-count-array-pairs-divisible-by-k.java ├── NOTES.md └── README.md ├── 2190-most-frequent-number-following-key-in-an-array ├── 2190-most-frequent-number-following-key-in-an-array.java └── README.md ├── 2215-find-the-difference-of-two-arrays ├── 2215-find-the-difference-of-two-arrays.java ├── NOTES.md └── README.md ├── 2216-delete-the-middle-node-of-a-linked-list ├── 2216-delete-the-middle-node-of-a-linked-list.java └── README.md ├── 2220-find-all-possible-recipes-from-given-supplies ├── 2220-find-all-possible-recipes-from-given-supplies.java └── README.md ├── 2220-minimum-bit-flips-to-convert-number ├── 2220-minimum-bit-flips-to-convert-number.java └── README.md ├── 2244-minimum-rounds-to-complete-all-tasks ├── 2244-minimum-rounds-to-complete-all-tasks.java ├── NOTES.md └── README.md ├── 2246-longest-path-with-different-adjacent-characters ├── 2246-longest-path-with-different-adjacent-characters.java └── README.md ├── 225-implement-stack-using-queues ├── 225-implement-stack-using-queues.java ├── NOTES.md └── README.md ├── 2255-minimum-swaps-to-group-all-1s-together-ii ├── 2255-minimum-swaps-to-group-all-1s-together-ii.java └── README.md ├── 2260-divide-a-string-into-groups-of-size-k ├── 2260-divide-a-string-into-groups-of-size-k.java └── README.md ├── 2264-largest-3-same-digit-number-in-string ├── 2264-largest-3-same-digit-number-in-string.java ├── NOTES.md └── README.md ├── 2265-partition-array-according-to-given-pivot ├── 2265-partition-array-according-to-given-pivot.java └── README.md ├── 228-summary-ranges ├── 228-summary-ranges.java ├── NOTES.md └── README.md ├── 2288-count-operations-to-obtain-zero ├── 2288-count-operations-to-obtain-zero.py └── README.md ├── 23-merge-k-sorted-lists ├── 23-merge-k-sorted-lists.java ├── NOTES.md └── README.md ├── 230-kth-smallest-element-in-a-bst ├── 230-kth-smallest-element-in-a-bst.java └── NOTES.md ├── 2307-replace-non-coprime-numbers-in-array ├── 2307-replace-non-coprime-numbers-in-array.py └── README.md ├── 2308-divide-array-into-equal-pairs ├── 2308-divide-array-into-equal-pairs.java └── README.md ├── 232-implement-queue-using-stacks ├── 232-implement-queue-using-stacks.java ├── NOTES.md └── README.md ├── 2324-find-triangular-sum-of-an-array ├── 2324-find-triangular-sum-of-an-array.java └── README.md ├── 234-palindrome-linked-list └── README.md ├── 2352-equal-row-and-column-pairs ├── 2352-equal-row-and-column-pairs.java └── NOTES.md ├── 236-lowest-common-ancestor-of-a-binary-tree ├── 236-lowest-common-ancestor-of-a-binary-tree.java ├── NOTES.md └── README.md ├── 238-product-of-array-except-self ├── 238-product-of-array-except-self.java ├── NOTES.md └── README.md ├── 2390-removing-stars-from-a-string ├── 2390-removing-stars-from-a-string.java ├── NOTES.md └── README.md ├── 2394-count-subarrays-with-score-less-than-k ├── 2394-count-subarrays-with-score-less-than-k.java └── README.md ├── 24-swap-nodes-in-pairs ├── 24-swap-nodes-in-pairs.java └── README.md ├── 240-search-a-2d-matrix-ii ├── 240-search-a-2d-matrix-ii.java ├── NOTES.md └── README.md ├── 2405-optimal-partition-of-string ├── 2405-optimal-partition-of-string.java ├── NOTES.md └── README.md ├── 2419-longest-subarray-with-maximum-bitwise-and ├── 2419-longest-subarray-with-maximum-bitwise-and.java ├── NOTES.md └── README.md ├── 2421-number-of-good-paths ├── 2421-number-of-good-paths.java └── README.md ├── 2427-first-letter-to-appear-twice ├── 2427-first-letter-to-appear-twice.java └── README.md ├── 2429-design-a-food-rating-system ├── 2429-design-a-food-rating-system.java └── README.md ├── 2448-count-number-of-bad-pairs ├── 2448-count-number-of-bad-pairs.java └── README.md ├── 2461-amount-of-time-for-binary-tree-to-be-infected ├── 2461-amount-of-time-for-binary-tree-to-be-infected.java └── README.md ├── 2463-minimum-recolors-to-get-k-consecutive-black-blocks ├── 2463-minimum-recolors-to-get-k-consecutive-black-blocks.java └── README.md ├── 2471-minimum-number-of-operations-to-sort-a-binary-tree-by-level ├── 2471-minimum-number-of-operations-to-sort-a-binary-tree-by-level.java └── README.md ├── 2478-longest-nice-subarray ├── 2478-longest-nice-subarray.java └── README.md ├── 2482-difference-between-ones-and-zeros-in-row-and-column ├── 2482-difference-between-ones-and-zeros-in-row-and-column.java ├── NOTES.md └── README.md ├── 2487-remove-nodes-from-linked-list ├── 2487-remove-nodes-from-linked-list.java ├── NOTES.md └── README.md ├── 2493-reverse-odd-levels-of-binary-tree ├── 2493-reverse-odd-levels-of-binary-tree.java └── README.md ├── 2551-apply-operations-to-an-array ├── 2551-apply-operations-to-an-array.java └── README.md ├── 2564-most-profitable-path-in-a-tree ├── 2564-most-profitable-path-in-a-tree.java └── README.md ├── 258-add-digits ├── 258-add-digits.java └── README.md ├── 2582-pass-the-pillow ├── 2582-pass-the-pillow.java ├── NOTES.md └── README.md ├── 2588-maximum-number-of-points-from-grid-queries ├── 2588-maximum-number-of-points-from-grid-queries.java └── README.md ├── 2610-closest-prime-numbers-in-range ├── 2610-closest-prime-numbers-in-range.java └── README.md ├── 2614-maximum-count-of-positive-integer-and-negative-integer ├── 2614-maximum-count-of-positive-integer-and-negative-integer.java └── README.md ├── 263-ugly-number ├── 263-ugly-number.java ├── NOTES.md └── README.md ├── 2649-count-total-number-of-colored-cells ├── 2649-count-total-number-of-colored-cells.java └── README.md ├── 2665-minimum-time-to-repair-cars ├── 2665-minimum-time-to-repair-cars.java └── README.md ├── 2681-put-marbles-in-bags ├── 2681-put-marbles-in-bags.java └── README.md ├── 2690-house-robber-iv ├── 2690-house-robber-iv.java └── README.md ├── 2707-extra-characters-in-a-string ├── 2707-extra-characters-in-a-string.java └── README.md ├── 2707-merge-two-2d-arrays-by-summing-values ├── 2707-merge-two-2d-arrays-by-summing-values.java └── README.md ├── 2751-robot-collisions ├── 2751-robot-collisions.java └── NOTES.md ├── 279-perfect-squares ├── 279-perfect-squares.java └── NOTES.md ├── 2793-count-the-number-of-complete-components ├── 2793-count-the-number-of-complete-components.java └── README.md ├── 2807-insert-greatest-common-divisors-in-linked-list ├── 2807-insert-greatest-common-divisors-in-linked-list.java └── README.md ├── 284-peeking-iterator ├── 284-peeking-iterator.java ├── NOTES.md └── README.md ├── 2869-minimum-operations-to-collect-elements ├── 2869-minimum-operations-to-collect-elements.java ├── NOTES.md └── README.md ├── 287-find-the-duplicate-number ├── 287-find-the-duplicate-number.java ├── NOTES.md └── README.md ├── 2887-sort-vowels-in-a-string ├── 2887-sort-vowels-in-a-string.py └── README.md ├── 2888-minimum-index-of-a-valid-split ├── 2888-minimum-index-of-a-valid-split.java └── README.md ├── 290-word-pattern ├── 290-word-pattern.java ├── NOTES.md └── README.md ├── 295-find-median-from-data-stream ├── 295-find-median-from-data-stream.java └── NOTES.md ├── 297-serialize-and-deserialize-binary-tree ├── 297-serialize-and-deserialize-binary-tree.java ├── NOTES.md └── README.md ├── 300-longest-increasing-subsequence ├── 300-longest-increasing-subsequence.java ├── NOTES.md └── README.md ├── 3001-apply-operations-to-maximize-score ├── 3001-apply-operations-to-maximize-score.java └── README.md ├── 3075-maximize-happiness-of-selected-children ├── 3075-maximize-happiness-of-selected-children.java ├── NOTES.md └── README.md ├── 316-remove-duplicate-letters ├── 316-remove-duplicate-letters.java ├── NOTES.md └── README.md ├── 3172-divisible-and-non-divisible-sums-difference ├── 3172-divisible-and-non-divisible-sums-difference.java └── README.md ├── 3201-distribute-candies-among-children-ii ├── 3201-distribute-candies-among-children-ii.java └── README.md ├── 3213-count-subarrays-where-max-element-appears-at-least-k-times ├── 3213-count-subarrays-where-max-element-appears-at-least-k-times.java └── README.md ├── 3227-find-missing-and-repeated-values ├── 3227-find-missing-and-repeated-values.java └── README.md ├── 3242-count-elements-with-maximum-frequency ├── 3242-count-elements-with-maximum-frequency.java └── README.md ├── 328-odd-even-linked-list ├── 328-odd-even-linked-list.java └── NOTES.md ├── 33-search-in-rotated-sorted-array └── 33-search-in-rotated-sorted-array.java ├── 3332-minimum-operations-to-exceed-threshold-value-ii ├── 3332-minimum-operations-to-exceed-threshold-value-ii.java └── README.md ├── 3348-minimum-cost-walk-in-weighted-graph ├── 3348-minimum-cost-walk-in-weighted-graph.java └── README.md ├── 3372-longest-strictly-increasing-or-strictly-decreasing-subarray ├── 3372-longest-strictly-increasing-or-strictly-decreasing-subarray.java └── README.md ├── 338-counting-bits ├── 338-counting-bits.java ├── NOTES.md └── README.md ├── 3398-make-a-square-with-the-same-color ├── 3398-make-a-square-with-the-same-color.java └── README.md ├── 34-find-first-and-last-position-of-element-in-sorted-array ├── 34-find-first-and-last-position-of-element-in-sorted-array.java ├── NOTES.md └── README.md ├── 3430-count-days-without-meetings ├── 3430-count-days-without-meetings.java └── README.md ├── 344-reverse-string ├── 344-reverse-string.java └── README.md ├── 3447-clear-digits ├── 3447-clear-digits.java └── README.md ├── 347-top-k-frequent-elements ├── 347-top-k-frequent-elements.java ├── NOTES.md └── README.md ├── 3475-minimum-operations-to-make-binary-array-elements-equal-to-one-i ├── 3475-minimum-operations-to-make-binary-array-elements-equal-to-one-i.java └── README.md ├── 3483-alternating-groups-ii ├── 3483-alternating-groups-ii.java └── README.md ├── 350-intersection-of-two-arrays-ii ├── 350-intersection-of-two-arrays-ii.java ├── NOTES.md └── README.md ├── 3501-delete-nodes-from-linked-list-present-in-array ├── 3501-delete-nodes-from-linked-list-present-in-array.java └── README.md ├── 3541-report-spam-message ├── 3541-report-spam-message.java └── README.md ├── 3569-count-of-substrings-containing-every-vowel-and-k-consonants-ii ├── 3569-count-of-substrings-containing-every-vowel-and-k-consonants-ii.java └── README.md ├── 36-valid-sudoku ├── 36-valid-sudoku.java ├── NOTES.md └── README.md ├── 3643-zero-array-transformation-ii ├── 3643-zero-array-transformation-ii.java └── README.md ├── 3657-check-if-grid-can-be-cut-into-sections ├── 3657-check-if-grid-can-be-cut-into-sections.java └── README.md ├── 3676-smallest-number-with-all-set-bits ├── 3676-smallest-number-with-all-set-bits.py └── README.md ├── 3685-count-subarrays-of-length-three-with-a-condition └── README.md ├── 371-sum-of-two-integers ├── 371-sum-of-two-integers.java ├── NOTES.md └── README.md ├── 380-insert-delete-getrandom-o1 ├── 380-insert-delete-getrandom-o1.java ├── NOTES.md └── README.md ├── 382-linked-list-random-node ├── 382-linked-list-random-node.java ├── NOTES.md └── README.md ├── 387-first-unique-character-in-a-string ├── 387-first-unique-character-in-a-string.java ├── NOTES.md └── README.md ├── 389-find-the-difference ├── 389-find-the-difference.java ├── NOTES.md └── README.md ├── 39-combination-sum ├── 39-combination-sum.java ├── NOTES.md └── README.md ├── 392-is-subsequence ├── 392-is-subsequence.java ├── NOTES.md └── README.md ├── 397-integer-replacement ├── 397-integer-replacement.java ├── NOTES.md └── README.md ├── 398-random-pick-index ├── 398-random-pick-index.java ├── NOTES.md └── README.md ├── 400-nth-digit ├── 400-nth-digit.java ├── NOTES.md └── README.md ├── 413-arithmetic-slices ├── 413-arithmetic-slices.java ├── NOTES.md └── README.md ├── 416-partition-equal-subset-sum ├── 416-partition-equal-subset-sum.java ├── NOTES.md └── README.md ├── 42-trapping-rain-water ├── 42-trapping-rain-water.java ├── NOTES.md └── README.md ├── 429-n-ary-tree-level-order-traversal ├── 429-n-ary-tree-level-order-traversal.java ├── NOTES.md └── README.md ├── 438-find-all-anagrams-in-a-string ├── 438-find-all-anagrams-in-a-string.java ├── NOTES.md └── README.md ├── 449-serialize-and-deserialize-bst ├── 449-serialize-and-deserialize-bst.java ├── NOTES.md └── README.md ├── 45-jump-game-ii ├── 45-jump-game-ii.java ├── NOTES.md └── README.md ├── 450-delete-node-in-a-bst ├── 450-delete-node-in-a-bst.java ├── NOTES.md └── README.md ├── 451-sort-characters-by-frequency ├── 451-sort-characters-by-frequency.java └── NOTES.md ├── 452-minimum-number-of-arrows-to-burst-balloons ├── 452-minimum-number-of-arrows-to-burst-balloons.java ├── NOTES.md └── README.md ├── 46-permutations ├── 46-permutations.java ├── NOTES.md └── README.md ├── 462-minimum-moves-to-equal-array-elements-ii ├── 462-minimum-moves-to-equal-array-elements-ii.java ├── NOTES.md └── README.md ├── 470-implement-rand10-using-rand7 ├── 470-implement-rand10-using-rand7.java ├── NOTES.md └── README.md ├── 48-rotate-image ├── 48-rotate-image.java ├── NOTES.md └── README.md ├── 494-target-sum ├── 494-target-sum.java ├── NOTES.md └── README.md ├── 496-next-greater-element-i ├── 496-next-greater-element-i.java ├── NOTES.md └── README.md ├── 509-fibonacci-number ├── 509-fibonacci-number.java ├── NOTES.md └── README.md ├── 511-game-play-analysis-i ├── 511-game-play-analysis-i.sql ├── NOTES.md └── README.md ├── 515-find-largest-value-in-each-tree-row ├── 515-find-largest-value-in-each-tree-row.java ├── NOTES.md └── README.md ├── 520-detect-capital ├── 520-detect-capital.java └── NOTES.md ├── 525-contiguous-array ├── 525-contiguous-array.java ├── NOTES.md └── README.md ├── 532-k-diff-pairs-in-an-array ├── 532-k-diff-pairs-in-an-array.java ├── NOTES.md └── README.md ├── 538-convert-bst-to-greater-tree ├── 538-convert-bst-to-greater-tree.java ├── NOTES.md └── README.md ├── 54-spiral-matrix ├── 54-spiral-matrix.java ├── NOTES.md └── README.md ├── 540-single-element-in-a-sorted-array ├── 540-single-element-in-a-sorted-array.java └── NOTES.md ├── 55-jump-game ├── 55-jump-game.java ├── NOTES.md └── README.md ├── 560-subarray-sum-equals-k ├── 560-subarray-sum-equals-k.java ├── NOTES.md └── README.md ├── 567-permutation-in-string ├── 567-permutation-in-string.java ├── NOTES.md └── README.md ├── 575-distribute-candies ├── 575-distribute-candies.java ├── NOTES.md └── README.md ├── 59-spiral-matrix-ii ├── 59-spiral-matrix-ii.java ├── NOTES.md └── README.md ├── 595-big-countries ├── 595-big-countries.sql ├── NOTES.md └── README.md ├── 596-classes-more-than-5-students ├── 596-classes-more-than-5-students.sql ├── NOTES.md └── README.md ├── 605-can-place-flowers ├── 605-can-place-flowers.java ├── NOTES.md └── README.md ├── 606-construct-string-from-binary-tree ├── 606-construct-string-from-binary-tree.java ├── NOTES.md └── README.md ├── 61-rotate-list ├── 61-rotate-list.java └── NOTES.md ├── 62-unique-paths ├── 62-unique-paths.java ├── NOTES.md └── README.md ├── 623-add-one-row-to-tree ├── 623-add-one-row-to-tree.java ├── NOTES.md └── README.md ├── 63-unique-paths-ii ├── 63-unique-paths-ii.java ├── NOTES.md └── README.md ├── 637-average-of-levels-in-binary-tree ├── NOTES.md └── README.md ├── 64-minimum-path-sum ├── 64-minimum-path-sum.java ├── NOTES.md └── README.md ├── 645-set-mismatch ├── 645-set-mismatch.java └── README.md ├── 662-maximum-width-of-binary-tree ├── 662-maximum-width-of-binary-tree.java ├── NOTES.md └── README.md ├── 669-trim-a-binary-search-tree ├── 669-trim-a-binary-search-tree.java ├── NOTES.md └── README.md ├── 67-add-binary ├── 67-add-binary.java └── README.md ├── 671-second-minimum-node-in-a-binary-tree ├── 671-second-minimum-node-in-a-binary-tree.java ├── NOTES.md └── README.md ├── 695-max-area-of-island ├── 695-max-area-of-island.java ├── NOTES.md └── README.md ├── 70-climbing-stairs ├── 70-climbing-stairs.java └── README.md ├── 700-search-in-a-binary-search-tree ├── 700-search-in-a-binary-search-tree.java ├── NOTES.md └── README.md ├── 701-insert-into-a-binary-search-tree ├── 701-insert-into-a-binary-search-tree.java ├── NOTES.md └── README.md ├── 704-binary-search ├── 704-binary-search.java ├── NOTES.md └── README.md ├── 709-to-lower-case ├── 709-to-lower-case.java ├── NOTES.md └── README.md ├── 72-edit-distance ├── 72-edit-distance.java ├── NOTES.md └── README.md ├── 73-set-matrix-zeroes ├── 73-set-matrix-zeroes.java ├── NOTES.md └── README.md ├── 735-asteroid-collision ├── 735-asteroid-collision.java └── NOTES.md ├── 739-daily-temperatures ├── 739-daily-temperatures.java ├── NOTES.md └── README.md ├── 74-search-a-2d-matrix ├── 74-search-a-2d-matrix.java ├── NOTES.md └── README.md ├── 740-delete-and-earn ├── 740-delete-and-earn.java └── README.md ├── 746-min-cost-climbing-stairs ├── 746-min-cost-climbing-stairs.java ├── NOTES.md └── README.md ├── 747-largest-number-at-least-twice-of-others ├── 747-largest-number-at-least-twice-of-others.java ├── NOTES.md └── README.md ├── 75-sort-colors ├── 75-sort-colors.java ├── NOTES.md └── README.md ├── 78-subsets ├── 78-subsets.java ├── NOTES.md └── README.md ├── 79-word-search ├── 79-word-search.java ├── NOTES.md └── README.md ├── 799-champagne-tower ├── 799-champagne-tower.java ├── NOTES.md └── README.md ├── 8-string-to-integer-atoi ├── 8-string-to-integer-atoi.java ├── NOTES.md └── README.md ├── 807-max-increase-to-keep-city-skyline ├── 807-max-increase-to-keep-city-skyline.java ├── NOTES.md └── README.md ├── 814-binary-tree-pruning ├── 814-binary-tree-pruning.c ├── 814-binary-tree-pruning.java ├── NOTES.md └── README.md ├── 82-remove-duplicates-from-sorted-list-ii ├── 82-remove-duplicates-from-sorted-list-ii.java ├── NOTES.md └── README.md ├── 846-hand-of-straights ├── 846-hand-of-straights.java ├── NOTES.md └── README.md ├── 849-maximize-distance-to-closest-person ├── 849-maximize-distance-to-closest-person.java ├── NOTES.md └── README.md ├── 852-peak-index-in-a-mountain-array ├── 852-peak-index-in-a-mountain-array.java ├── NOTES.md └── README.md ├── 867-transpose-matrix ├── 867-transpose-matrix.java ├── NOTES.md └── README.md ├── 875-koko-eating-bananas ├── 875-koko-eating-bananas.java ├── NOTES.md └── README.md ├── 88-merge-sorted-array ├── 88-merge-sorted-array.java ├── NOTES.md └── README.md ├── 889-construct-binary-tree-from-preorder-and-postorder-traversal ├── 889-construct-binary-tree-from-preorder-and-postorder-traversal.java ├── NOTES.md └── README.md ├── 890-find-and-replace-pattern ├── 890-find-and-replace-pattern.java ├── NOTES.md └── README.md ├── 9-palindrome-number ├── 9-palindrome-number.cpp ├── 9-palindrome-number.java ├── NOTES.md └── README.md ├── 931-minimum-falling-path-sum └── 931-minimum-falling-path-sum.java ├── 94-binary-tree-inorder-traversal ├── 94-binary-tree-inorder-traversal.java ├── NOTES.md └── README.md ├── 941-valid-mountain-array ├── 941-valid-mountain-array.java ├── NOTES.md └── README.md ├── 946-validate-stack-sequences ├── 946-validate-stack-sequences.java ├── NOTES.md └── README.md ├── 96-unique-binary-search-trees ├── 96-unique-binary-search-trees.java ├── NOTES.md └── README.md ├── 969-pancake-sorting ├── 969-pancake-sorting.java ├── NOTES.md └── README.md ├── 973-k-closest-points-to-origin ├── 973-k-closest-points-to-origin.java ├── NOTES.md └── README.md ├── 991-broken-calculator ├── 991-broken-calculator.java ├── NOTES.md └── README.md ├── Binary Search - GFG ├── README.md └── binary-search.java ├── Bottom View of Binary Tree - GFG ├── README.md └── bottom-view-of-binary-tree.java ├── Buildings receiving sunlight - GFG ├── README.md └── buildings-receiving-sunlight.java ├── Check for BST - GFG ├── README.md └── check-for-bst.java ├── Check if Linked List is Palindrome - GFG ├── README.md └── check-if-linked-list-is-palindrome.java ├── Connect Nodes at Same Level - GFG ├── README.md └── connect-nodes-at-same-level.java ├── Count distinct elements in every window - GFG ├── README.md └── count-distinct-elements-in-every-window.java ├── Count pairs in array divisible by K - GFG ├── README.md └── count-pairs-in-array-divisible-by-k.java ├── Detect Loop in linked list - GFG ├── README.md └── detect-loop-in-linked-list.java ├── Diameter of a Binary Tree - GFG ├── README.md └── diameter-of-a-binary-tree.java ├── Find Transition Point - GFG ├── README.md └── find-transition-point.java ├── Find duplicates in an array - GFG ├── README.md └── find-duplicates-in-an-array.java ├── Finding middle element in a linked list - GFG ├── README.md └── finding-middle-element-in-a-linked-list.java ├── GCD of two numbers - GFG ├── README.md └── gcd-of-two-numbers.java ├── Get minimum element from stack - GFG ├── README.md └── get-minimum-element-from-stack.java ├── Given a linked list of 0s, 1s and 2s, sort it. - GFG ├── README.md └── given-a-linked-list-of-0s-1s-and-2s-sort-it..java ├── Height of Binary Tree - GFG ├── README.md └── height-of-binary-tree.java ├── Inorder Successor in BST - GFG ├── README.md └── inorder-successor-in-bst.java ├── Intersection Point in Y Shapped Linked Lists - GFG ├── README.md └── intersection-point-in-y-shapped-linked-lists.java ├── Kadane's Algorithm - GFG ├── README.md └── kadanes-algorithm.java ├── Largest value in each level - GFG ├── README.md └── largest-value-in-each-level.java ├── Left View of Binary Tree - GFG ├── README.md └── left-view-of-binary-tree.java ├── Level order traversal in spiral form - GFG ├── README.md └── level-order-traversal-in-spiral-form.java ├── Lowest Common Ancestor in a Binary Tree - GFG ├── README.md └── lowest-common-ancestor-in-a-binary-tree.java ├── Max Sum Subarray of size K - GFG ├── README.md └── max-sum-subarray-of-size-k.java ├── Maximum no of 1's row - GFG ├── README.md └── maximum-no-of-1s-row.java ├── Minimum Operations - GFG ├── README.md └── minimum-operations.java ├── Missing number in array - GFG ├── README.md └── missing-number-in-array.java ├── Move all zeroes to end of array - GFG ├── README.md └── move-all-zeroes-to-end-of-array.java ├── Peak element - GFG ├── README.md └── peak-element.java ├── README.md ├── Rearrange a linked list - GFG ├── README.md └── rearrange-a-linked-list.java ├── Remove loop in Linked List - GFG ├── README.md └── remove-loop-in-linked-list.java ├── Rotate Array - GFG ├── README.md └── rotate-array.c ├── Rotate a Linked List - GFG ├── README.md └── rotate-a-linked-list.java ├── Subset Sum Problem - GFG └── subset-sum-problem.java ├── Sum Tree - GFG ├── README.md └── sum-tree.java ├── Top View of Binary Tree - GFG ├── README.md └── top-view-of-binary-tree.java ├── Trailing zeroes in factorial - GFG ├── README.md └── trailing-zeroes-in-factorial.java ├── Transform to Sum Tree - GFG └── README.md ├── Vertical Traversal of Binary Tree - GFG ├── README.md └── vertical-traversal-of-binary-tree.java ├── a-number-after-a-double-reversal ├── README.md └── a-number-after-a-double-reversal.java ├── add-digits ├── README.md └── add-digits.java ├── add-two-numbers-ii ├── README.md └── add-two-numbers-ii.java ├── add-two-numbers ├── README.md └── add-two-numbers.java ├── adding-spaces-to-a-string ├── README.md └── adding-spaces-to-a-string.java ├── apply-discount-every-n-orders ├── README.md └── apply-discount-every-n-orders.java ├── arranging-coins ├── README.md └── arranging-coins.java ├── array-partition-i ├── README.md └── array-partition-i.java ├── average-of-levels-in-binary-tree ├── README.md └── average-of-levels-in-binary-tree.java ├── balanced-binary-tree ├── README.md └── balanced-binary-tree.java ├── binary-search ├── README.md └── binary-search.java ├── binary-tree-inorder-traversal ├── README.md └── binary-tree-inorder-traversal.java ├── binary-tree-postorder-traversal ├── README.md └── binary-tree-postorder-traversal.java ├── binary-tree-preorder-traversal ├── README.md └── binary-tree-preorder-traversal.java ├── binary-tree-tilt ├── README.md └── binary-tree-tilt.java ├── bitwise-and-of-numbers-range ├── README.md ├── bitwise-and-of-numbers-range.cpp └── bitwise-and-of-numbers-range.java ├── calculate-money-in-leetcode-bank ├── README.md └── calculate-money-in-leetcode-bank.java ├── check-if-a-word-occurs-as-a-prefix-of-any-word-in-a-sentence ├── README.md └── check-if-a-word-occurs-as-a-prefix-of-any-word-in-a-sentence.java ├── check-if-all-as-appears-before-all-bs ├── README.md └── check-if-all-as-appears-before-all-bs.java ├── check-if-one-string-swap-can-make-strings-equal ├── README.md └── check-if-one-string-swap-can-make-strings-equal.java ├── check-if-the-sentence-is-pangram ├── README.md └── check-if-the-sentence-is-pangram.java ├── check-if-two-string-arrays-are-equivalent ├── README.md └── check-if-two-string-arrays-are-equivalent.java ├── climbing-stairs ├── README.md ├── climbing-stairs.cpp └── climbing-stairs.java ├── complement-of-base-10-integer ├── README.md └── complement-of-base-10-integer.java ├── complex-number-multiplication ├── README.md └── complex-number-multiplication.java ├── concatenation-of-array ├── README.md └── concatenation-of-array.java ├── consecutive-characters ├── README.md └── consecutive-characters.java ├── contains-duplicate ├── README.md └── contains-duplicate.java ├── convert-1d-array-into-2d-array ├── README.md └── convert-1d-array-into-2d-array.java ├── convert-binary-number-in-a-linked-list-to-integer ├── README.md └── convert-binary-number-in-a-linked-list-to-integer.java ├── convert-sorted-array-to-binary-search-tree ├── README.md └── convert-sorted-array-to-binary-search-tree.java ├── convert-sorted-list-to-binary-search-tree ├── README.md └── convert-sorted-list-to-binary-search-tree.java ├── count-complete-tree-nodes ├── README.md └── count-complete-tree-nodes.java ├── count-items-matching-a-rule ├── README.md └── count-items-matching-a-rule.java ├── count-negative-numbers-in-a-sorted-matrix ├── README.md └── count-negative-numbers-in-a-sorted-matrix.java ├── count-number-of-pairs-with-absolute-difference-k ├── README.md └── count-number-of-pairs-with-absolute-difference-k.java ├── count-odd-numbers-in-an-interval-range ├── README.md └── count-odd-numbers-in-an-interval-range.java ├── count-primes ├── README.md └── count-primes.java ├── create-target-array-in-the-given-order ├── README.md └── create-target-array-in-the-given-order.java ├── delete-leaves-with-a-given-value ├── README.md └── delete-leaves-with-a-given-value.java ├── delete-node-in-a-linked-list ├── README.md └── delete-node-in-a-linked-list.java ├── delete-the-middle-node-of-a-linked-list ├── README.md └── delete-the-middle-node-of-a-linked-list.java ├── design-a-stack-with-increment-operation ├── README.md └── design-a-stack-with-increment-operation.java ├── design-browser-history ├── README.md └── design-browser-history.java ├── design-circular-queue ├── README.md └── design-circular-queue.java ├── design-linked-list ├── README.md └── design-linked-list.java ├── destroying-asteroids ├── README.md └── destroying-asteroids.java ├── detect-capital ├── README.md └── detect-capital.java ├── diameter-of-binary-tree ├── README.md └── diameter-of-binary-tree.java ├── encode-and-decode-tinyurl ├── README.md └── encode-and-decode-tinyurl.java ├── fibonacci-number ├── README.md └── fibonacci-number.java ├── final-value-of-variable-after-performing-operations ├── README.md └── final-value-of-variable-after-performing-operations.java ├── find-all-duplicates-in-an-array ├── README.md └── find-all-duplicates-in-an-array.java ├── find-first-and-last-position-of-element-in-sorted-array ├── README.md └── find-first-and-last-position-of-element-in-sorted-array.java ├── find-first-palindromic-string-in-the-array ├── README.md └── find-first-palindromic-string-in-the-array.java ├── find-minimum-in-rotated-sorted-array ├── README.md └── find-minimum-in-rotated-sorted-array.java ├── find-pivot-index ├── README.md └── find-pivot-index.java ├── find-the-duplicate-number ├── README.md └── find-the-duplicate-number.java ├── find-the-student-that-will-replace-the-chalk ├── README.md └── find-the-student-that-will-replace-the-chalk.java ├── find-the-town-judge ├── README.md └── find-the-town-judge.java ├── finding-pairs-with-a-certain-sum ├── README.md └── finding-pairs-with-a-certain-sum.java ├── first-bad-version ├── README.md └── first-bad-version.java ├── first-missing-positive ├── README.md └── first-missing-positive.java ├── first-unique-character-in-a-string ├── README.md └── first-unique-character-in-a-string.java ├── flatten-a-multilevel-doubly-linked-list ├── README.md └── flatten-a-multilevel-doubly-linked-list.java ├── flatten-binary-tree-to-linked-list ├── README.md └── flatten-binary-tree-to-linked-list.java ├── guess-number-higher-or-lower ├── README.md └── guess-number-higher-or-lower.java ├── implement-strstr ├── README.md └── implement-strstr.java ├── insert-into-a-binary-search-tree ├── README.md └── insert-into-a-binary-search-tree.java ├── intersection-of-two-arrays ├── README.md └── intersection-of-two-arrays.java ├── invert-binary-tree ├── README.md └── invert-binary-tree.java ├── kth-largest-element-in-an-array ├── README.md └── kth-largest-element-in-an-array.java ├── largest-perimeter-triangle ├── README.md └── largest-perimeter-triangle.java ├── length-of-last-word ├── README.md └── length-of-last-word.java ├── linked-list-cycle ├── README.md └── linked-list-cycle.java ├── linked-list-random-node ├── README.md └── linked-list-random-node.java ├── longest-increasing-subsequence ├── README.md └── longest-increasing-subsequence.java ├── longest-substring-without-repeating-characters ├── README.md └── longest-substring-without-repeating-characters.java ├── majority-element ├── README.md └── majority-element.java ├── make-two-arrays-equal-by-reversing-sub-arrays ├── README.md └── make-two-arrays-equal-by-reversing-sub-arrays.java ├── matrix-diagonal-sum ├── README.md └── matrix-diagonal-sum.java ├── max-consecutive-ones ├── README.md └── max-consecutive-ones.java ├── maximum-binary-tree ├── README.md └── maximum-binary-tree.java ├── maximum-depth-of-binary-tree ├── README.md └── maximum-depth-of-binary-tree.java ├── maximum-depth-of-n-ary-tree ├── README.md └── maximum-depth-of-n-ary-tree.java ├── maximum-ice-cream-bars ├── README.md └── maximum-ice-cream-bars.java ├── maximum-number-of-coins-you-can-get ├── README.md └── maximum-number-of-coins-you-can-get.java ├── maximum-product-difference-between-two-pairs ├── README.md └── maximum-product-difference-between-two-pairs.java ├── maximum-product-of-three-numbers ├── README.md └── maximum-product-of-three-numbers.java ├── maximum-product-of-two-elements-in-an-array ├── README.md └── maximum-product-of-two-elements-in-an-array.java ├── maximum-product-subarray ├── README.md └── maximum-product-subarray.java ├── maximum-subarray ├── README.md └── maximum-subarray.java ├── median-of-two-sorted-arrays ├── README.md └── median-of-two-sorted-arrays.java ├── merge-in-between-linked-lists ├── README.md └── merge-in-between-linked-lists.java ├── merge-two-sorted-lists ├── README.md └── merge-two-sorted-lists.java ├── middle-of-the-linked-list ├── README.md └── middle-of-the-linked-list.java ├── minimize-maximum-pair-sum-in-array ├── README.md └── minimize-maximum-pair-sum-in-array.java ├── minimum-absolute-difference ├── README.md └── minimum-absolute-difference.java ├── minimum-moves-to-equal-array-elements-ii ├── README.md └── minimum-moves-to-equal-array-elements-ii.java ├── minimum-number-of-operations-to-move-all-balls-to-each-box ├── README.md └── minimum-number-of-operations-to-move-all-balls-to-each-box.java ├── minimum-number-of-steps-to-make-two-strings-anagram ├── README.md └── minimum-number-of-steps-to-make-two-strings-anagram.java ├── minimum-operations-to-make-array-equal ├── README.md └── minimum-operations-to-make-array-equal.java ├── missing-number ├── README.md └── missing-number.java ├── move-zeroes ├── README.md └── move-zeroes.java ├── n-ary-tree-postorder-traversal ├── README.md └── n-ary-tree-postorder-traversal.java ├── n-ary-tree-preorder-traversal ├── README.md └── n-ary-tree-preorder-traversal.java ├── n-repeated-element-in-size-2n-array ├── README.md └── n-repeated-element-in-size-2n-array.java ├── number-complement ├── README.md └── number-complement.java ├── number-of-laser-beams-in-a-bank ├── README.md └── number-of-laser-beams-in-a-bank.java ├── number-of-segments-in-a-string ├── README.md └── number-of-segments-in-a-string.java ├── number-of-steps-to-reduce-a-number-to-zero ├── README.md └── number-of-steps-to-reduce-a-number-to-zero.java ├── odd-even-linked-list ├── README.md └── odd-even-linked-list.java ├── palindrome-linked-list ├── README.md └── palindrome-linked-list.java ├── palindrome-number ├── README.md └── palindrome-number.java ├── partition-list ├── README.md └── partition-list.java ├── partitioning-into-minimum-number-of-deci-binary-numbers ├── README.md └── partitioning-into-minimum-number-of-deci-binary-numbers.java ├── pascals-triangle-ii ├── README.md └── pascals-triangle-ii.java ├── pascals-triangle ├── README.md └── pascals-triangle.java ├── path-sum └── README.md ├── plus-one ├── README.md └── plus-one.java ├── power-of-two ├── README.md ├── power-of-two.java └── power-of-two.py ├── range-sum-of-bst ├── README.md └── range-sum-of-bst.java ├── reduce-array-size-to-the-half ├── README.md └── reduce-array-size-to-the-half.java ├── remove-all-adjacent-duplicates-in-string ├── README.md └── remove-all-adjacent-duplicates-in-string.java ├── remove-all-occurrences-of-a-substring ├── README.md └── remove-all-occurrences-of-a-substring.java ├── remove-duplicates-from-sorted-array ├── README.md └── remove-duplicates-from-sorted-array.java ├── remove-duplicates-from-sorted-list-ii ├── README.md └── remove-duplicates-from-sorted-list-ii.java ├── remove-element ├── README.md └── remove-element.java ├── remove-linked-list-elements ├── README.md └── remove-linked-list-elements.java ├── remove-nth-node-from-end-of-list ├── README.md └── remove-nth-node-from-end-of-list.java ├── reorder-list ├── README.md └── reorder-list.java ├── reordered-power-of-2 ├── README.md └── reordered-power-of-2.java ├── reverse-integer ├── README.md └── reverse-integer.java ├── reverse-linked-list-ii ├── README.md └── reverse-linked-list-ii.java ├── reverse-linked-list ├── README.md └── reverse-linked-list.java ├── reverse-nodes-in-k-group ├── README.md └── reverse-nodes-in-k-group.java ├── reverse-string ├── README.md └── reverse-string.java ├── reverse-words-in-a-string ├── README.md └── reverse-words-in-a-string.java ├── rotate-array ├── README.md └── rotate-array.java ├── rotate-list ├── README.md └── rotate-list.java ├── running-sum-of-1d-array ├── README.md └── running-sum-of-1d-array.java ├── same-tree ├── README.md └── same-tree.java ├── search-insert-position ├── README.md └── search-insert-position.java ├── second-largest-digit-in-a-string ├── README.md └── second-largest-digit-in-a-string.java ├── shuffle-an-array ├── README.md └── shuffle-an-array.java ├── sign-of-the-product-of-an-array ├── README.md └── sign-of-the-product-of-an-array.java ├── simple-bank-system ├── README.md └── simple-bank-system.java ├── single-element-in-a-sorted-array ├── README.md └── single-element-in-a-sorted-array.java ├── single-number-ii ├── README.md └── single-number-ii.java ├── single-number ├── README.md └── single-number.java ├── sort-an-array ├── README.md └── sort-an-array.java ├── sort-array-by-parity └── sort-array-by-parity.java ├── sort-colors ├── README.md └── sort-colors.java ├── sort-list ├── README.md └── sort-list.java ├── stats.json ├── subdomain-visit-count ├── README.md └── subdomain-visit-count.java ├── 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