├── .github └── FUNDING.yml ├── 1-lclighter-data-idlgt255811883-data-bundle-id0-stylebackground-image-linear-gradienttransparent-0-transparent-calc50-4px-rgb204-242-241-calc50-4px-rgb204-242-241-100-transition-background-position-120ms-ease-in-out-0s-padding-120ms-ease-in-out-0s-background-size-100-200-background-position-initial-user-select-auto-two-sum-lclighterdiv-classlinerthreadicon-linerfirst-lineroverlapse-data-highlight-id255811883-data-bundle-id0-idlgt255811883-stylebackground-image-url-and-quot-https-photogetlinercom-liner-service-bucket-user-photo-default-color-2-vsvg-and-quot-user-select-auto-div-classlinerthreadicon-dim-styleuser-select-auto-div-div-classlinerthreadicon-mentioned-styleuser-select-auto-div-classlinerthreadicon-mentionedimg-styleuser-select-auto-div-div-div-classlinerthreadicon-onlyme-styleuser-select-auto-div-classlinerthreadicon-onlymeimg-styleuser-select-auto-div-div-divdiv-classlinerthreadicon-linersecond-data-highlight-id257820954-data-bundle-id0-idlgt257820954-stylebackground-image-url-and-quot-https-photogetlinercom-liner-service-bucket-user-photo-default-color-5-gsvg-and-quot-user-select-auto-div-classlinerthreadicon-dim-styleuser-select-auto-div-div-classlinerthreadicon-mentioned-styleuser-select-auto-div-classlinerthreadicon-mentionedimg-styleuser-select-auto-div-div-div-classlinerthreadicon-onlyme-styleuser-select-auto-div-classlinerthreadicon-onlymeimg-styleuser-select-auto-div-div-div ├── 1-lclighter-data-idlgt255811883-data-bundle-id0-stylebackground-image-linear-gradienttransparent-0-transparent-calc50-4px-rgb204-242-241-calc50-4px-rgb204-242-241-100-transition-background-position-120ms-ease-in-out-0s-padding-120ms-ease-in-out-0s-background-size-100-200-background-position-initial-user-select-auto-two-sum-lclighterdiv-classlinerthreadicon-linerfirst-lineroverlapse-data-highlight-id255811883-data-bundle-id0-idlgt255811883-stylebackground-image-url-and-quot-https-photogetlinercom-liner-service-bucket-user-photo-default-color-2-vsvg-and-quot-user-select-auto-div-classlinerthreadicon-dim-styleuser-select-auto-div-div-classlinerthreadicon-mentioned-styleuser-select-auto-div-classlinerthreadicon-mentionedimg-styleuser-select-auto-div-div-div-classlinerthreadicon-onlyme-styleuser-select-auto-div-classlinerthreadicon-onlymeimg-styleuser-select-auto-div-div-divdiv-classlinerthreadicon-linersecond-data-highlight-id257820954-data-bundle-id0-idlgt257820954-stylebackground-image-url-and-quot-https-photogetlinercom-liner-service-bucket-user-photo-default-color-5-gsvg-and-quot-user-select-auto-div-classlinerthreadicon-dim-styleuser-select-auto-div-div-classlinerthreadicon-mentioned-styleuser-select-auto-div-classlinerthreadicon-mentionedimg-styleuser-select-auto-div-div-div-classlinerthreadicon-onlyme-styleuser-select-auto-div-classlinerthreadicon-onlymeimg-styleuser-select-auto-div-div-div.py ├── NOTES.md └── README.md ├── 100-same-tree ├── 100-same-tree.py └── README.md ├── 1004-max-consecutive-ones-iii ├── 1004-max-consecutive-ones-iii.py ├── NOTES.md └── README.md ├── 101-symmetric-tree ├── 101-symmetric-tree.py └── NOTES.md ├── 102-binary-tree-level-order-traversal ├── 102-binary-tree-level-order-traversal.py ├── NOTES.md └── README.md ├── 103-binary-tree-zigzag-level-order-traversal ├── 103-binary-tree-zigzag-level-order-traversal.py ├── NOTES.md └── README.md ├── 107-binary-tree-level-order-traversal-ii ├── 107-binary-tree-level-order-traversal-ii.py ├── NOTES.md └── README.md ├── 108-convert-sorted-array-to-binary-search-tree ├── 108-convert-sorted-array-to-binary-search-tree.py ├── NOTES.md └── README.md ├── 111-minimum-depth-of-binary-tree ├── 111-minimum-depth-of-binary-tree.py ├── NOTES.md └── README.md ├── 112-path-sum ├── 112-path-sum.py ├── NOTES.md └── README.md ├── 113-path-sum-ii ├── 113-path-sum-ii.py └── NOTES.md ├── 116-populating-next-right-pointers-in-each-node ├── 116-populating-next-right-pointers-in-each-node.py ├── NOTES.md └── README.md ├── 117-populating-next-right-pointers-in-each-node-ii ├── 117-populating-next-right-pointers-in-each-node-ii.py ├── NOTES.md └── README.md ├── 121-best-time-to-buy-and-sell-stock ├── 121-best-time-to-buy-and-sell-stock.py ├── NOTES.md └── README.md ├── 122-best-time-to-buy-and-sell-stock-ii ├── 122-best-time-to-buy-and-sell-stock-ii.py ├── NOTES.md └── README.md ├── 124-binary-tree-maximum-path-sum ├── 124-binary-tree-maximum-path-sum.py ├── NOTES.md └── README.md ├── 125-valid-palindrome ├── NOTES.md └── README.md ├── 127-word-ladder ├── 127-word-ladder.java ├── NOTES.md └── README.md ├── 1281-subtract-the-product-and-sum-of-digits-of-an-integer ├── 1281-subtract-the-product-and-sum-of-digits-of-an-integer.py └── NOTES.md ├── 129-sum-root-to-leaf-numbers ├── 129-sum-root-to-leaf-numbers.py └── README.md ├── 1323-maximum-69-number ├── 1323-maximum-69-number.py ├── NOTES.md └── README.md ├── 133-clone-graph ├── 133-clone-graph.py ├── NOTES.md └── README.md ├── 134-gas-station ├── 134-gas-station.py ├── NOTES.md └── README.md ├── 1342-number-of-steps-to-reduce-a-number-to-zero ├── 1342-number-of-steps-to-reduce-a-number-to-zero.py ├── NOTES.md └── README.md ├── 1379-find-a-corresponding-node-of-a-binary-tree-in-a-clone-of-that-tree ├── 1379-find-a-corresponding-node-of-a-binary-tree-in-a-clone-of-that-tree.py ├── NOTES.md └── README.md ├── 142-linked-list-cycle-ii ├── 142-linked-list-cycle-ii.py ├── NOTES.md └── README.md ├── 143-reorder-list ├── 143-reorder-list.py ├── NOTES.md └── README.md ├── 146-lru-cache ├── 146-lru-cache.py └── README.md ├── 148-sort-list ├── 148-sort-list.py ├── NOTES.md └── README.md ├── 1480-running-sum-of-1d-array ├── 1480-running-sum-of-1d-array.py ├── NOTES.md └── README.md ├── 1486-xor-operation-in-an-array ├── 1486-xor-operation-in-an-array.py ├── NOTES.md └── README.md ├── 15-3sum ├── 15-3sum.py ├── NOTES.md └── README.md ├── 1512-number-of-good-pairs ├── 1512-number-of-good-pairs.py ├── NOTES.md └── README.md ├── 1528-shuffle-string ├── NOTES.md └── README.md ├── 1534-count-good-triplets ├── 1534-count-good-triplets.py ├── NOTES.md └── README.md ├── 155-min-stack ├── NOTES.md └── README.md ├── 1557-minimum-number-of-vertices-to-reach-all-nodes ├── 1557-minimum-number-of-vertices-to-reach-all-nodes.py ├── NOTES.md └── README.md ├── 16-3sum-closest ├── 16-3sum-closest.py ├── NOTES.md └── README.md ├── 160-intersection-of-two-linked-lists ├── 160-intersection-of-two-linked-lists.py └── README.md ├── 162-find-peak-element ├── 162-find-peak-element.py ├── NOTES.md └── README.md ├── 169-majority-element ├── 169-majority-element.py ├── NOTES.md └── README.md ├── 17-letter-combinations-of-a-phone-number ├── 17-letter-combinations-of-a-phone-number.py ├── NOTES.md └── README.md ├── 171-excel-sheet-column-number ├── 171-excel-sheet-column-number.py ├── NOTES.md └── README.md ├── 1780-check-if-number-is-a-sum-of-powers-of-three ├── 1780-check-if-number-is-a-sum-of-powers-of-three.py ├── NOTES.md └── README.md ├── 18-4sum ├── 18-4sum.py ├── NOTES.md └── README.md ├── 1812-determine-color-of-a-chessboard-square ├── 1812-determine-color-of-a-chessboard-square.py ├── NOTES.md └── README.md ├── 189-rotate-array ├── 189-rotate-array.py └── NOTES.md ├── 19-remove-nth-node-from-end-of-list ├── NOTES.md └── README.md ├── 199-binary-tree-right-side-view ├── 199-binary-tree-right-side-view.py ├── NOTES.md └── README.md ├── 2-add-two-numbers ├── 2-add-two-numbers.py ├── NOTES.md └── README.md ├── 20-valid-parentheses ├── 20-valid-parentheses.py ├── NOTES.md └── README.md ├── 200-number-of-islands ├── 200-number-of-islands.py ├── NOTES.md └── README.md ├── 2011-final-value-of-variable-after-performing-operations ├── 2011-final-value-of-variable-after-performing-operations.py ├── NOTES.md └── README.md ├── 202-happy-number ├── 202-happy-number.py ├── NOTES.md └── README.md ├── 203-remove-linked-list-elements ├── 203-remove-linked-list-elements.py ├── NOTES.md └── README.md ├── 205-isomorphic-strings ├── 205-isomorphic-strings.js ├── 205-isomorphic-strings.py └── README.md ├── 2059-minimum-operations-to-convert-number ├── 2059-minimum-operations-to-convert-number.py ├── NOTES.md └── README.md ├── 206-reverse-linked-list ├── 206-reverse-linked-list.py ├── NOTES.md └── README.md ├── 207-course-schedule ├── 207-course-schedule.py ├── NOTES.md └── README.md ├── 208-implement-trie-prefix-tree ├── 208-implement-trie-prefix-tree.py ├── NOTES.md └── README.md ├── 2089-find-target-indices-after-sorting-array ├── 2089-find-target-indices-after-sorting-array.py ├── NOTES.md └── README.md ├── 209-minimum-size-subarray-sum ├── 209-minimum-size-subarray-sum.py ├── NOTES.md └── README.md ├── 21-merge-two-sorted-lists ├── 21-merge-two-sorted-lists.py ├── NOTES.md └── README.md ├── 210-course-schedule-ii ├── 210-course-schedule-ii.py ├── NOTES.md └── README.md ├── 215-kth-largest-element-in-an-array ├── 215-kth-largest-element-in-an-array.py └── README.md ├── 217-contains-duplicate ├── 217-contains-duplicate.py ├── NOTES.md └── README.md ├── 219-contains-duplicate-ii ├── 219-contains-duplicate-ii.py ├── NOTES.md └── README.md ├── 220-contains-duplicate-iii ├── 220-contains-duplicate-iii.py └── NOTES.md ├── 222-count-complete-tree-nodes ├── 222-count-complete-tree-nodes.py └── README.md ├── 2235-add-two-integers ├── 2235-add-two-integers.py ├── NOTES.md └── README.md ├── 2236-root-equals-sum-of-children ├── 2236-root-equals-sum-of-children.cpp ├── 2236-root-equals-sum-of-children.py ├── NOTES.md └── README.md ├── 229-majority-element-ii ├── 229-majority-element-ii.py └── README.md ├── 23-merge-k-sorted-lists ├── 23-merge-k-sorted-lists.py ├── NOTES.md └── README.md ├── 231-power-of-two ├── 231-power-of-two.py ├── NOTES.md └── README.md ├── 234-palindrome-linked-list ├── 234-palindrome-linked-list.py ├── NOTES.md └── README.md ├── 237-delete-node-in-a-linked-list ├── NOTES.md └── README.md ├── 240-search-a-2d-matrix-ii ├── 240-search-a-2d-matrix-ii.py ├── NOTES.md └── README.md ├── 242-valid-anagram ├── 242-valid-anagram.py └── README.md ├── 257-binary-tree-paths ├── 257-binary-tree-paths.py ├── NOTES.md └── README.md ├── 26-remove-duplicates-from-sorted-array ├── 26-remove-duplicates-from-sorted-array.py └── README.md ├── 27-remove-element ├── 27-remove-element.py ├── NOTES.md └── README.md ├── 275-h-index-ii ├── 275-h-index-ii.py ├── NOTES.md └── README.md ├── 278-first-bad-version ├── 278-first-bad-version.py ├── NOTES.md └── README.md ├── 28-implement-strstr ├── 28-implement-strstr.py └── NOTES.md ├── 283-move-zeroes ├── NOTES.md └── README.md ├── 287-find-the-duplicate-number ├── 287-find-the-duplicate-number.py ├── NOTES.md └── README.md ├── 295-find-median-from-data-stream ├── 295-find-median-from-data-stream.java ├── NOTES.md └── README.md ├── 3-longest-substring-without-repeating-characters ├── 3-longest-substring-without-repeating-characters.py ├── NOTES.md └── README.md ├── 30-substring-with-concatenation-of-all-words ├── 30-substring-with-concatenation-of-all-words.py └── NOTES.md ├── 303-range-sum-query-immutable ├── 303-range-sum-query-immutable.py ├── NOTES.md └── README.md ├── 304-range-sum-query-2d-immutable ├── 304-range-sum-query-2d-immutable.py ├── NOTES.md └── README.md ├── 326-power-of-three ├── 326-power-of-three.py ├── NOTES.md └── README.md ├── 33-search-in-rotated-sorted-array ├── 33-search-in-rotated-sorted-array.py ├── NOTES.md └── README.md ├── 34-find-first-and-last-position-of-element-in-sorted-array ├── 34-find-first-and-last-position-of-element-in-sorted-array.py ├── NOTES.md └── README.md ├── 342-power-of-four ├── 342-power-of-four.py ├── NOTES.md └── README.md ├── 344-reverse-string ├── 344-reverse-string.py └── README.md ├── 349-intersection-of-two-arrays ├── 349-intersection-of-two-arrays.py ├── NOTES.md └── README.md ├── 35-search-insert-position ├── 35-search-insert-position.py ├── NOTES.md └── README.md ├── 392-is-subsequence ├── 392-is-subsequence.py └── README.md ├── 4-median-of-two-sorted-arrays ├── 4-median-of-two-sorted-arrays.py ├── NOTES.md └── README.md ├── 409-longest-palindrome ├── 409-longest-palindrome.py ├── NOTES.md └── README.md ├── 41-first-missing-positive ├── 41-first-missing-positive.py ├── NOTES.md └── README.md ├── 412-fizz-buzz └── 412-fizz-buzz.py ├── 414-third-maximum-number ├── 414-third-maximum-number.py ├── NOTES.md └── README.md ├── 417-pacific-atlantic-water-flow ├── 417-pacific-atlantic-water-flow.py ├── NOTES.md └── README.md ├── 424-longest-repeating-character-replacement ├── 424-longest-repeating-character-replacement.py ├── NOTES.md └── README.md ├── 437-path-sum-iii ├── 437-path-sum-iii.py ├── NOTES.md └── README.md ├── 438-find-all-anagrams-in-a-string ├── 438-find-all-anagrams-in-a-string.py ├── NOTES.md └── README.md ├── 442-find-all-duplicates-in-an-array ├── 442-find-all-duplicates-in-an-array.py ├── NOTES.md └── README.md ├── 448-find-all-numbers-disappeared-in-an-array ├── 448-find-all-numbers-disappeared-in-an-array.py ├── NOTES.md └── README.md ├── 451-sort-characters-by-frequency ├── 451-sort-characters-by-frequency.py ├── NOTES.md └── README.md ├── 457-circular-array-loop ├── 457-circular-array-loop.py ├── NOTES.md └── README.md ├── 46-permutations ├── 46-permutations.py ├── NOTES.md └── README.md ├── 463-island-perimeter ├── 463-island-perimeter.py └── README.md ├── 49-group-anagrams ├── 49-group-anagrams.py ├── NOTES.md └── README.md ├── 50-powx-n ├── 50-powx-n.py ├── NOTES.md └── README.md ├── 500-keyboard-row ├── 500-keyboard-row.py ├── NOTES.md └── README.md ├── 509-fibonacci-number ├── 509-fibonacci-number.py └── README.md ├── 515-find-largest-value-in-each-tree-row ├── 515-find-largest-value-in-each-tree-row.py ├── NOTES.md └── README.md ├── 53-maximum-subarray ├── 53-maximum-subarray.py ├── NOTES.md └── README.md ├── 532-k-diff-pairs-in-an-array ├── 532-k-diff-pairs-in-an-array.py ├── NOTES.md └── README.md ├── 543-diameter-of-binary-tree ├── 543-diameter-of-binary-tree.py ├── NOTES.md └── README.md ├── 547-number-of-provinces ├── 547-number-of-provinces.py ├── NOTES.md └── README.md ├── 56-merge-intervals ├── 56-merge-intervals.py ├── NOTES.md └── README.md ├── 58-length-of-last-word ├── 58-length-of-last-word.py ├── NOTES.md └── README.md ├── 581-shortest-unsorted-continuous-subarray ├── 581-shortest-unsorted-continuous-subarray.py ├── NOTES.md └── README.md ├── 60-permutation-sequence ├── 60-permutation-sequence.py ├── NOTES.md └── README.md ├── 637-average-of-levels-in-binary-tree ├── 637-average-of-levels-in-binary-tree.py ├── NOTES.md └── README.md ├── 643-maximum-average-subarray-i ├── 643-maximum-average-subarray-i.py ├── NOTES.md └── README.md ├── 645-set-mismatch ├── 645-set-mismatch.py ├── NOTES.md └── README.md ├── 67-add-binary └── NOTES.md ├── 69-sqrtx └── NOTES.md ├── 70-climbing-stairs ├── 70-climbing-stairs.py ├── NOTES.md └── README.md ├── 704-binary-search ├── NOTES.md └── README.md ├── 724-find-pivot-index ├── 724-find-pivot-index.py └── README.md ├── 73-set-matrix-zeroes ├── 73-set-matrix-zeroes.py ├── NOTES.md └── README.md ├── 74-search-a-2d-matrix ├── 74-search-a-2d-matrix.py ├── NOTES.md └── README.md ├── 743-network-delay-time ├── NOTES.md └── README.md ├── 75-sort-colors ├── 75-sort-colors.py ├── NOTES.md └── README.md ├── 752-open-the-lock ├── 752-open-the-lock.py └── README.md ├── 76-minimum-window-substring ├── 76-minimum-window-substring.py └── README.md ├── 771-jewels-and-stones ├── 771-jewels-and-stones.py ├── NOTES.md └── README.md ├── 78-subsets ├── 78-subsets.py ├── NOTES.md └── README.md ├── 79-word-search ├── NOTES.md └── README.md ├── 81-search-in-rotated-sorted-array-ii ├── 81-search-in-rotated-sorted-array-ii.py ├── NOTES.md └── README.md ├── 83-remove-duplicates-from-sorted-list ├── 83-remove-duplicates-from-sorted-list.py ├── NOTES.md └── README.md ├── 836-rectangle-overlap ├── 836-rectangle-overlap.py └── README.md ├── 841-keys-and-rooms ├── 841-keys-and-rooms.py ├── NOTES.md └── README.md ├── 841-lclighter-data-idlgt257723750-data-bundle-id0-stylebackground-image-linear-gradienttransparent-0-transparent-calc50-4px-rgb204-242-241-calc50-4px-rgb204-242-241-100-transition-background-position-120ms-ease-in-out-0s-padding-120ms-ease-in-out-0s-background-size-100-200-background-position-initial-user-select-auto-keys-and-rooms-lclighterdiv-classlinerthreadicon-linerfirst-data-highlight-id257723750-data-bundle-id0-idlgt257723750-stylebackground-image-url-and-quot-https-profilegetlinercom-liner-service-bucket-user-photo-default-color-10-wsvg-and-quot-user-select-auto-div-classlinerthreadicon-dim-styleuser-select-auto-div-div-classlinerthreadicon-mentioned-styleuser-select-auto-div-classlinerthreadicon-mentionedimg-styleuser-select-auto-div-div-div-classlinerthreadicon-onlyme-styleuser-select-auto-div-classlinerthreadicon-onlymeimg-styleuser-select-auto-div-div-div ├── 841-lclighter-data-idlgt257723750-data-bundle-id0-stylebackground-image-linear-gradienttransparent-0-transparent-calc50-4px-rgb204-242-241-calc50-4px-rgb204-242-241-100-transition-background-position-120ms-ease-in-out-0s-padding-120ms-ease-in-out-0s-background-size-100-200-background-position-initial-user-select-auto-keys-and-rooms-lclighterdiv-classlinerthreadicon-linerfirst-data-highlight-id257723750-data-bundle-id0-idlgt257723750-stylebackground-image-url-and-quot-https-profilegetlinercom-liner-service-bucket-user-photo-default-color-10-wsvg-and-quot-user-select-auto-div-classlinerthreadicon-dim-styleuser-select-auto-div-div-classlinerthreadicon-mentioned-styleuser-select-auto-div-classlinerthreadicon-mentionedimg-styleuser-select-auto-div-div-div-classlinerthreadicon-onlyme-styleuser-select-auto-div-classlinerthreadicon-onlymeimg-styleuser-select-auto-div-div-div.py ├── NOTES.md └── README.md ├── 844-backspace-string-compare ├── 844-backspace-string-compare.py └── README.md ├── 852-peak-index-in-a-mountain-array ├── 852-peak-index-in-a-mountain-array.py └── README.md ├── 860-lemonade-change └── NOTES.md ├── 876-middle-of-the-linked-list ├── 876-middle-of-the-linked-list.py ├── NOTES.md └── README.md ├── 9-palindrome-number ├── 9-palindrome-number.py ├── NOTES.md └── README.md ├── 904-fruit-into-baskets ├── 904-fruit-into-baskets.py ├── NOTES.md └── README.md ├── 912-sort-an-array ├── 912-sort-an-array.py ├── NOTES.md └── README.md ├── 94-binary-tree-inorder-traversal ├── 94-binary-tree-inorder-traversal.py └── NOTES.md ├── 986-interval-list-intersections ├── 986-interval-list-intersections.py ├── NOTES.md └── README.md ├── CodeSignal2.py ├── DoublyLinkedList Insertion ├── Easy ├── BinarySearch ├── FirstBadVersion ├── Number of 1 Bits ├── RansomNote ├── SearchInsertPosition ├── SortArrayByParty └── TwoSum ├── Helpful.md ├── hard └── median-of-two-sorted-arrays.py ├── medium ├── Add Two Numbers ├── BinaryTree_Right_Side ├── Coin Change.py ├── Domino and Trimino └── Heap_HireK └── number-of-provinces ├── README.md └── number-of-provinces.py /.github/FUNDING.yml: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/MennaEwas/LeetCode/HEAD/.github/FUNDING.yml -------------------------------------------------------------------------------- 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