├── .github └── CONTRIBUTING.md ├── .gitignore ├── CHANGELOG.md ├── LICENSE ├── README.md ├── algorithms ├── 1-bit-and-2-bit-characters.cpp ├── 3sum-closest.cpp ├── 4sum.cpp ├── README.md ├── add-binary.cpp ├── add-digits.cpp ├── add-strings.cpp ├── add-to-array-form-of-integer.rs ├── add-two-numbers.cpp ├── all-paths-from-source-to-target.cpp ├── all-possible-full-binary-trees.rs ├── arranging-coins.cpp ├── array-partition-i.cpp ├── assign-cookies.cpp ├── available-captures-for-rook.py ├── average-of-levels-in-binary-tree.cpp ├── backspace-string-compare.cpp ├── balanced-binary-tree.cpp ├── base-7.cpp ├── baseball-game.py ├── battleships-in-a-board.rs ├── best-time-to-buy-and-sell-stock-ii.cpp ├── best-time-to-buy-and-sell-stock.cpp ├── binary-gap.cpp ├── binary-number-with-alternating-bits.cpp ├── binary-prefix-divisible-by-5.rs ├── binary-search-tree-iterator.rs ├── binary-search-tree-to-greater-sum-tree.cpp ├── binary-search.cpp ├── binary-tree-inorder-traversal.cpp ├── binary-tree-level-order-traversal-ii.cpp ├── binary-tree-level-order-traversal.rs ├── binary-tree-paths.cpp ├── binary-tree-postorder-traversal.py ├── binary-tree-preorder-traversal.py ├── binary-tree-pruning.cpp ├── binary-tree-right-side-view.rs ├── binary-tree-tilt.cpp ├── binary-tree-zigzag-level-order-traversal.cpp ├── binary-watch.cpp ├── brick-wall.cpp ├── buddy-strings.cpp ├── can-place-flowers.cpp ├── climbing-stairs.cpp ├── combination-sum-iii.rs ├── combinations.cpp ├── complement-of-base-10-integer.rs ├── complex-number-multiplication.py ├── construct-binary-tree-from-inorder-and-postorder-traversal.cpp ├── construct-quad-tree.cpp ├── construct-string-from-binary-tree.cpp ├── construct-the-rectangle.cpp ├── container-with-most-water.cpp ├── contains-duplicate-ii.cpp ├── contains-duplicate.cpp ├── convert-a-number-to-hexadecimal.cpp ├── convert-bst-to-greater-tree.cpp ├── convert-sorted-array-to-binary-search-tree.cpp ├── count-and-say.cpp ├── count-binary-substrings.cpp ├── count-complete-tree-nodes.rs ├── count-primes.cpp ├── counting-bits.cpp ├── decode-ways.cpp ├── deepest-leaves-sum.cpp ├── degree-of-an-array.py ├── delete-columns-to-make-sorted.cpp ├── delete-node-in-a-linked-list.cpp ├── design-circular-deque.py ├── design-circular-queue.cpp ├── design-hashmap.cpp ├── design-hashset.cpp ├── detect-capital.cpp ├── di-string-match.cpp ├── diameter-of-binary-tree.cpp ├── different-ways-to-add-parentheses.py ├── distribute-candies.cpp ├── divide-two-integers.cpp ├── divisor-game.rs ├── employee-importance.cpp ├── encode-and-decode-tinyurl.py ├── evaluate-reverse-polish-notation.rs ├── excel-sheet-column-number.cpp ├── excel-sheet-column-title.cpp ├── factorial-trailing-zeroes.cpp ├── fair-candy-swap.cpp ├── fibonacci-number.rs ├── filling-bookcase-shelves.cpp ├── find-all-anagrams-in-a-string.cpp ├── find-all-duplicates-in-an-array.py ├── find-all-numbers-disappeared-in-an-array.cpp ├── find-and-replace-pattern.cpp ├── find-bottom-left-tree-value.cpp ├── find-first-and-last-position-of-element-in-sorted-array.cpp ├── find-largest-value-in-each-tree-row.rs ├── find-minimum-in-rotated-sorted-array.rs ├── find-mode-in-binary-search-tree.py ├── find-peak-element.rs ├── find-pivot-index.cpp ├── find-smallest-letter-greater-than-target.cpp ├── find-the-difference.cpp ├── find-the-duplicate-number.cpp ├── find-the-town-judge.rs ├── first-bad-version.cpp ├── first-missing-positive.cpp ├── first-unique-character-in-a-string.cpp ├── fizz-buzz.cpp ├── flipping-an-image.cpp ├── flood-fill.cpp ├── game-of-life.rs ├── generate-parentheses.cpp ├── goat-latin.py ├── guess-number-higher-or-lower.cpp ├── h-index.rs ├── hamming-distance.cpp ├── heaters.cpp ├── house-robber.cpp ├── image-smoother.cpp ├── implement-queue-using-stacks.cpp ├── implement-stack-using-queues.cpp ├── implement-strstr.cpp ├── increasing-order-search-tree.cpp ├── insert-into-a-binary-search-tree.cpp ├── integer-to-roman.cpp ├── intersection-of-two-arrays-ii.cpp ├── intersection-of-two-arrays.cpp ├── intersection-of-two-linked-lists.cpp ├── invert-binary-tree.cpp ├── is-subsequence.cpp ├── island-perimeter.cpp ├── isomorphic-strings.cpp ├── jewels-and-stones.cpp ├── judge-route-circle.cpp ├── jump-game.cpp ├── k-closest-points-to-origin.rs ├── k-diff-pairs-in-an-array.cpp ├── keyboard-row.cpp ├── kth-largest-element-in-a-stream.cpp ├── kth-largest-element-in-an-array.rs ├── kth-smallest-element-in-a-bst.py ├── kth-smallest-element-in-a-sorted-matrix.rs ├── largest-number-at-least-twice-of-others.cpp ├── largest-number.rs ├── largest-palindrome-product.cpp ├── largest-perimeter-triangle.rs ├── largest-time-for-given-digits.py ├── largest-triangle-area.cpp ├── leaf-similar-trees.py ├── lemonade-change.cpp ├── length-of-last-word.cpp ├── letter-case-permutation.cpp ├── letter-combinations-of-a-phone-number.cpp ├── license-key-formatting.cpp ├── linked-list-cycle.cpp ├── long-pressed-name.cpp ├── longest-common-prefix.cpp ├── longest-consecutive-sequence.cpp ├── longest-continuous-increasing-subsequence.cpp ├── longest-harmonious-subsequence.cpp ├── longest-palindrome.py ├── longest-palindromic-substring.cpp ├── longest-substring-without-repeating-characters.cpp ├── longest-uncommon-subsequence-i.cpp ├── longest-univalue-path.cpp ├── longest-word-in-dictionary.py ├── lowest-common-ancestor-of-a-binary-search-tree.cpp ├── magic-squares-in-grid.py ├── majority-element-ii.cpp ├── majority-element.cpp ├── map-sum-pairs.rs ├── max-area-of-island.cpp ├── max-consecutive-ones.cpp ├── max-increase-to-keep-city-skyline.cpp ├── maximize-distance-to-closest-person.cpp ├── maximize-sum-of-array-after-k-negations.rs ├── maximum-average-subarray-i.cpp ├── maximum-binary-tree.cpp ├── maximum-depth-of-binary-tree.cpp ├── maximum-depth-of-n-ary-tree.cpp ├── maximum-level-sum-of-a-binary-tree.cpp ├── maximum-product-of-three-numbers.cpp ├── maximum-subarray.cpp ├── maximum-width-of-binary-tree.rs ├── maximum-xor-of-two-numbers-in-an-array.rs ├── median-of-two-sorted-arrays.cpp ├── merge-intervals.rs ├── merge-sorted-array.cpp ├── merge-two-binary-trees.cpp ├── merge-two-sorted-lists.cpp ├── middle-of-the-linked-list.cpp ├── min-cost-climbing-stairs.cpp ├── min-stack.cpp ├── minimum-absolute-difference-in-bst.cpp ├── minimum-add-to-make-parentheses-valid.py ├── minimum-depth-of-binary-tree.cpp ├── minimum-distance-between-bst-nodes.cpp ├── minimum-index-sum-of-two-lists.cpp ├── minimum-moves-to-equal-array-elements.py ├── minimum-path-sum.cpp ├── minimum-size-subarray-sum.cpp ├── missing-number.cpp ├── monotonic-array.cpp ├── most-common-word.py ├── move-zeroes.cpp ├── moving-stones-until-consecutive.rs ├── multiply-strings.py ├── n-ary-tree-level-order-traversal.cpp ├── n-ary-tree-postorder-traversal.cpp ├── n-ary-tree-preorder-traversal.cpp ├── n-repeated-element-in-size-2n-array.py ├── network-delay-time.cpp ├── next-greater-element-i.cpp ├── next-permutation.cpp ├── nim-game.cpp ├── non-decreasing-array.cpp ├── nth-digit.cpp ├── number-complement.py ├── number-of-1-bits.cpp ├── number-of-boomerangs.py ├── number-of-islands.rs ├── number-of-lines-to-write-string.py ├── number-of-recent-calls.py ├── number-of-segments-in-a-string.py ├── pairs-of-songs-with-total-durations-divisible-by-60.rs ├── palindrome-linked-list.cpp ├── palindrome-number.cpp ├── pancake-sorting.py ├── partition-array-into-three-parts-with-equal-sum.rs ├── partition-labels.rs ├── pascals-triangle-ii.cpp ├── pascals-triangle.cpp ├── path-sum-iii.cpp ├── path-sum.cpp ├── peak-index-in-a-mountain-array.cpp ├── peeking-iterator.py ├── perfect-number.cpp ├── permutations-ii.cpp ├── permutations.cpp ├── plus-one.cpp ├── poor-pigs.cpp ├── positions-of-large-groups.cpp ├── power-of-four.cpp ├── power-of-three.cpp ├── power-of-two.cpp ├── powerful-integers.rs ├── powx-n.cpp ├── prime-number-of-set-bits-in-binary-representation.cpp ├── projection-area-of-3d-shapes.cpp ├── quad-tree-intersection.cpp ├── rabbits-in-forest.rs ├── range-addition-ii.cpp ├── range-sum-of-bst.py ├── range-sum-query-immutable.cpp ├── ransom-note.cpp ├── reach-a-number.cpp ├── rectangle-area.cpp ├── rectangle-overlap.cpp ├── relative-ranks.cpp ├── remove-duplicates-from-sorted-array.cpp ├── remove-duplicates-from-sorted-list.cpp ├── remove-element.cpp ├── remove-linked-list-elements.cpp ├── remove-nth-node-from-end-of-list.cpp ├── remove-outermost-parentheses.rs ├── reorder-log-files.py ├── repeated-string-match.cpp ├── repeated-substring-pattern.cpp ├── reshape-the-matrix.cpp ├── reveal-cards-in-increasing-order.py ├── reverse-bits.cpp ├── reverse-integer.cpp ├── reverse-linked-list.cpp ├── reverse-only-letters.cpp ├── reverse-string-ii.cpp ├── reverse-string.cpp ├── reverse-vowels-of-a-string.cpp ├── reverse-words-in-a-string-iii.py ├── robot-bounded-in-circle.rs ├── roman-to-integer.cpp ├── rotate-array.cpp ├── rotate-image.cpp ├── rotate-string.cpp ├── rotting-oranges.rs ├── same-tree.cpp ├── score-after-flipping-matrix.cpp ├── score-of-parentheses.rs ├── search-a-2d-matrix-ii.cpp ├── search-a-2d-matrix.cpp ├── search-in-a-binary-search-tree.cpp ├── search-in-rotated-sorted-array.cpp ├── search-insert-position.cpp ├── second-minimum-node-in-a-binary-tree.cpp ├── self-dividing-numbers.cpp ├── set-matrix-zeroes.cpp ├── set-mismatch.cpp ├── shortest-completing-word.py ├── shortest-distance-to-a-character.cpp ├── shortest-unsorted-continuous-subarray.cpp ├── single-element-in-a-sorted-array.rs ├── single-number-ii.rs ├── single-number-iii.rs ├── single-number.cpp ├── smallest-range-i.cpp ├── sort-array-by-parity-ii.py ├── sort-array-by-parity.cpp ├── sort-characters-by-frequency.rs ├── sort-colors.rs ├── spiral-matrix-ii.cpp ├── spiral-matrix.cpp ├── sqrtx.cpp ├── squares-of-a-sorted-array.rs ├── stone-game.rs ├── string-compression.py ├── string-to-integer-atoi.cpp ├── string-without-aaa-or-bbb.rs ├── student-attendance-record-i.cpp ├── subdomain-visit-count.py ├── subsets.py ├── subtree-of-another-tree.cpp ├── sudoku-solver.cpp ├── sum-of-even-numbers-after-queries.rs ├── sum-of-left-leaves.cpp ├── sum-of-square-numbers.cpp ├── sum-of-two-integers.cpp ├── sum-root-to-leaf-numbers.rs ├── surface-area-of-3d-shapes.cpp ├── symmetric-tree.cpp ├── third-maximum-number.cpp ├── to-lower-case.cpp ├── toeplitz-matrix.py ├── top-k-frequent-elements.py ├── transpose-matrix.cpp ├── trim-a-binary-search-tree.cpp ├── two-city-scheduling.rs ├── two-sum-ii-input-array-is-sorted.cpp ├── two-sum-iv-input-is-a-bst.cpp ├── two-sum.cpp ├── ugly-number.cpp ├── uncommon-words-from-two-sentences.py ├── unique-binary-search-trees.rs ├── unique-email-addresses.py ├── unique-morse-code-words.cpp ├── univalued-binary-tree.py ├── valid-anagram.cpp ├── valid-mountain-array.cpp ├── valid-number.py ├── valid-palindrome-ii.py ├── valid-palindrome.cpp ├── valid-parentheses.cpp ├── valid-perfect-square.cpp ├── valid-sudoku.py ├── validate-binary-search-tree.rs ├── verifying-an-alien-dictionary.py ├── walking-robot-simulation.py ├── wiggle-sort-ii.rs ├── wiggle-subsequence.cpp ├── word-break-ii.cpp ├── word-pattern.py ├── x-of-a-kind-in-a-deck-of-cards.cpp └── zigzag-conversion.cpp ├── assets └── multi-solution.png ├── database ├── README.md ├── big-countries.sql ├── classes-more-than-5-students.sql ├── combine-two-tables.sql ├── consecutive-numbers.sql ├── customers-who-never-order.sql ├── delete-duplicate-emails.sql ├── department-highest-salary.sql ├── department-top-three-salaries.sql ├── duplicate-emails.sql ├── employees-earning-more-than-their-managers.sql ├── exchange-seats.sql ├── human-traffic-of-stadium.sql ├── not-boring-movies.sql ├── nth-highest-salary.sql ├── rank-scores.sql ├── rising-temperature.sql ├── second-highest-salary.sql ├── swap-salary.sql └── trips-and-users.sql └── shell ├── README.md ├── tenth-line.sh ├── transpose-file.sh ├── valid-phone-numbers.sh └── word-frequency.sh /.github/CONTRIBUTING.md: 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