# LeetCode

## LeetCode

- [Introduction](https://wentao-shao.gitbook.io/leetcode/master.md)
- [Array](https://wentao-shao.gitbook.io/leetcode/array.md)
- [Best Time To Buy And Sell Stock](https://wentao-shao.gitbook.io/leetcode/array/best-time-to-buy-and-sell-stock.md)
- [121.Best-Time-to-Buy-and-Sell-Stock](https://wentao-shao.gitbook.io/leetcode/array/best-time-to-buy-and-sell-stock/121.best-time-to-buy-and-sell-stock.md)
- [122.Best-Time-to-Buy-and-Sell-Stock-II](https://wentao-shao.gitbook.io/leetcode/array/best-time-to-buy-and-sell-stock/122.best-time-to-buy-and-sell-stock-ii.md)
- [123.Best-Time-to-Buy-and-Sell-Stock-III](https://wentao-shao.gitbook.io/leetcode/array/best-time-to-buy-and-sell-stock/123.best-time-to-buy-and-sell-stock-iii.md)
- [188.Best-Time-to-Buy-and-Sell-Stock-IV](https://wentao-shao.gitbook.io/leetcode/array/best-time-to-buy-and-sell-stock/188.best-time-to-buy-and-sell-stock-iv.md)
- [1.Two-Sum](https://wentao-shao.gitbook.io/leetcode/array/1.two-sum.md)
- [1007.Minimum-Domino-Rotations-For-Equal-Row](https://wentao-shao.gitbook.io/leetcode/array/1007.minimum-domino-rotations-for-equal-row.md)
- [1031.Maximum-Sum-of-Two-Non-Overlapping-Subarrays](https://wentao-shao.gitbook.io/leetcode/array/1031.maximum-sum-of-two-non-overlapping-subarrays.md)
- [1052.Grumpy-Bookstore-Owner](https://wentao-shao.gitbook.io/leetcode/array/1052.grumpy-bookstore-owner.md)
- [11.Container-With-Most-Water](https://wentao-shao.gitbook.io/leetcode/array/11.container-with-most-water.md)
- [1122.Relative-Sort-Array](https://wentao-shao.gitbook.io/leetcode/array/1122.relative-sort-array.md)
- [1163.Last-Substring-in-Lexicographical-Order](https://wentao-shao.gitbook.io/leetcode/array/1163.last-substring-in-lexicographical-order.md)
- [\[118.Pascal's-Triangle\](Array/118.Pascal's-Triangle.md)](https://wentao-shao.gitbook.io/leetcode/array/118.pascals-triangle-array-118.pascals-triangle-md.md)
- [1181.Before-and-After-Puzzle](https://wentao-shao.gitbook.io/leetcode/array/1181.before-and-after-puzzle.md)
- [1231.Divide-Chocolate](https://wentao-shao.gitbook.io/leetcode/array/1231.divide-chocolate.md)
- [1296.Divide-Array-in-Sets-of-K-Consecutive-Numbers](https://wentao-shao.gitbook.io/leetcode/array/1296.divide-array-in-sets-of-k-consecutive-numbers.md)
- [1304.Find-N-Unique-Integers-Sum-up-to-Zero](https://wentao-shao.gitbook.io/leetcode/array/1304.find-n-unique-integers-sum-up-to-zero.md)
- [134.Gas-Station](https://wentao-shao.gitbook.io/leetcode/array/134.gas-station.md)
- [135.Candy](https://wentao-shao.gitbook.io/leetcode/array/135.candy.md)
- [1352.Product-of-the-Last-K-Numbers](https://wentao-shao.gitbook.io/leetcode/array/1352.product-of-the-last-k-numbers.md)
- [136.Single-Number](https://wentao-shao.gitbook.io/leetcode/array/136.single-number.md)
- [14.Longest-Common-Prefix](https://wentao-shao.gitbook.io/leetcode/array/14.longest-common-prefix.md)
- [1477.Find-Two-Non-overlapping-Sub-arrays-Each-With-Target-Sum](https://wentao-shao.gitbook.io/leetcode/array/1477.find-two-non-overlapping-sub-arrays-each-with-target-sum.md)
- [15.3Sum](https://wentao-shao.gitbook.io/leetcode/array/15.3sum.md)
- [152.Maximum-Product-Subarray](https://wentao-shao.gitbook.io/leetcode/array/152.maximum-product-subarray.md)
- [16.3Sum-Closest](https://wentao-shao.gitbook.io/leetcode/array/16.3sum-closest.md)
- [163.Missing-Ranges](https://wentao-shao.gitbook.io/leetcode/array/163.missing-ranges.md)
- [169.Majority-Element](https://wentao-shao.gitbook.io/leetcode/array/169.majority-element.md)
- [18.4Sum](https://wentao-shao.gitbook.io/leetcode/array/18.4sum.md)
- [189.Rotate-Array](https://wentao-shao.gitbook.io/leetcode/array/189.rotate-array.md)
- [204.Count-Primes](https://wentao-shao.gitbook.io/leetcode/array/204.count-primes.md)
- [215.Kth-Largest-Element-in-an-Array](https://wentao-shao.gitbook.io/leetcode/array/215.kth-largest-element-in-an-array.md)
- [217.Contains-Duplicate](https://wentao-shao.gitbook.io/leetcode/array/217.contains-duplicate.md)
- [219.Contains-Duplicate-II](https://wentao-shao.gitbook.io/leetcode/array/219.contains-duplicate-ii.md)
- [220.Contains-Duplicate-III](https://wentao-shao.gitbook.io/leetcode/array/220.contains-duplicate-iii.md)
- [228.Summary-Ranges](https://wentao-shao.gitbook.io/leetcode/array/228.summary-ranges.md)
- [229.Majority-Element-II](https://wentao-shao.gitbook.io/leetcode/array/229.majority-element-ii.md)
- [238.Product-of-Array-Except-Self](https://wentao-shao.gitbook.io/leetcode/array/238.product-of-array-except-self.md)
- [239.Sliding-Window-Maximum](https://wentao-shao.gitbook.io/leetcode/array/239.sliding-window-maximum.md)
- [243.Shortest-Word-Distance](https://wentao-shao.gitbook.io/leetcode/array/243.shortest-word-distance.md)
- [252.Meeting-Rooms](https://wentao-shao.gitbook.io/leetcode/array/252.meeting-rooms.md)
- [266.Palindrome-Permutation](https://wentao-shao.gitbook.io/leetcode/array/266.palindrome-permutation.md)
- [268.Missing-Number](https://wentao-shao.gitbook.io/leetcode/array/268.missing-number.md)
- [273.Integer-to-English-Words](https://wentao-shao.gitbook.io/leetcode/array/273.integer-to-english-words.md)
- [279.Perfect-Squares](https://wentao-shao.gitbook.io/leetcode/array/279.perfect-squares.md)
- [283.Move-Zeroes](https://wentao-shao.gitbook.io/leetcode/array/283.move-zeroes.md)
- [287.Find-the-Duplicate-Number](https://wentao-shao.gitbook.io/leetcode/array/287.find-the-duplicate-number.md)
- [29.Divide-Two-Integers](https://wentao-shao.gitbook.io/leetcode/array/29.divide-two-integers.md)
- [299.Bulls-and-Cows](https://wentao-shao.gitbook.io/leetcode/array/299.bulls-and-cows.md)
- [31.Next-Permutation](https://wentao-shao.gitbook.io/leetcode/array/31.next-permutation.md)
- [325.Maximum-Size-Subarray-Sum-Equals-k](https://wentao-shao.gitbook.io/leetcode/array/325.maximum-size-subarray-sum-equals-k.md)
- [334.Increasing-Triplet-Subsequence](https://wentao-shao.gitbook.io/leetcode/array/334.increasing-triplet-subsequence.md)
- [340.Longest-Substring-with-At-Most-K-Distinct-Characters](https://wentao-shao.gitbook.io/leetcode/array/340.longest-substring-with-at-most-k-distinct-characters.md)
- [347.Top-K-Frequent-Elements](https://wentao-shao.gitbook.io/leetcode/array/347.top-k-frequent-elements.md)
- [349.Intersection-of-Two-Arrays](https://wentao-shao.gitbook.io/leetcode/array/349.intersection-of-two-arrays.md)
- [350.Intersection-of-Two-Arrays-II](https://wentao-shao.gitbook.io/leetcode/array/350.intersection-of-two-arrays-ii.md)
- [354.Russian-Doll-Envelopes](https://wentao-shao.gitbook.io/leetcode/array/354.russian-doll-envelopes.md)
- [367.Valid-Perfect-Square](https://wentao-shao.gitbook.io/leetcode/array/367.valid-perfect-square.md)
- [378.Kth-Smallest-Element-in-a-Sorted-Matrix](https://wentao-shao.gitbook.io/leetcode/array/378.kth-smallest-element-in-a-sorted-matrix.md)
- [38.Count-and-Say](https://wentao-shao.gitbook.io/leetcode/array/38.count-and-say.md)
- [383.Ransom-Note](https://wentao-shao.gitbook.io/leetcode/array/383.ransom-note.md)
- [387.First-Unique-Character-in-a-String](https://wentao-shao.gitbook.io/leetcode/array/387.first-unique-character-in-a-string.md)
- [4.Median-of-Two-Sorted-Arrays](https://wentao-shao.gitbook.io/leetcode/array/4.median-of-two-sorted-arrays.md)
- [406.Queue-Reconstruction-by-Height](https://wentao-shao.gitbook.io/leetcode/array/406.queue-reconstruction-by-height.md)
- [410.Split-Array-Largest-Sum](https://wentao-shao.gitbook.io/leetcode/array/410.split-array-largest-sum.md)
- [412.Fizz-Buzz](https://wentao-shao.gitbook.io/leetcode/array/412.fizz-buzz.md)
- [419.Battleships-in-a-Board](https://wentao-shao.gitbook.io/leetcode/array/419.battleships-in-a-board.md)
- [435.Non-overlapping-Intervals](https://wentao-shao.gitbook.io/leetcode/array/435.non-overlapping-intervals.md)
- [438.Find-All-Anagrams-in-a-String](https://wentao-shao.gitbook.io/leetcode/array/438.find-all-anagrams-in-a-string.md)
- [442.Find-All-Duplicates-in-an-Array](https://wentao-shao.gitbook.io/leetcode/array/442.find-all-duplicates-in-an-array.md)
- [457.Circular-Array-Loop](https://wentao-shao.gitbook.io/leetcode/array/457.circular-array-loop.md)
- [509.Fibonacci-Number](https://wentao-shao.gitbook.io/leetcode/array/509.fibonacci-number.md)
- [53.Maximum-Subarray](https://wentao-shao.gitbook.io/leetcode/array/53.maximum-subarray.md)
- [539.Minimum-Time-Difference](https://wentao-shao.gitbook.io/leetcode/array/539.minimum-time-difference.md)
- [540.Single-Element-in-a-Sorted-Array](https://wentao-shao.gitbook.io/leetcode/array/540.single-element-in-a-sorted-array.md)
- [56.Merge-Intervals](https://wentao-shao.gitbook.io/leetcode/array/56.merge-intervals.md)
- [560.Subarray-Sum-Equals-K](https://wentao-shao.gitbook.io/leetcode/array/560.subarray-sum-equals-k.md)
- [57.Insert-Interval](https://wentao-shao.gitbook.io/leetcode/array/57.insert-interval.md)
- [575.Distribute-Candies](https://wentao-shao.gitbook.io/leetcode/array/575.distribute-candies.md)
- [581.Shortest-Unsorted-Continuous-Subarray](https://wentao-shao.gitbook.io/leetcode/array/581.shortest-unsorted-continuous-subarray.md)
- [593.Valid-Square](https://wentao-shao.gitbook.io/leetcode/array/593.valid-square.md)
- [6.ZigZag-Conversion](https://wentao-shao.gitbook.io/leetcode/array/6.zigzag-conversion.md)
- [609.Find-Duplicate-File-in-System](https://wentao-shao.gitbook.io/leetcode/array/609.find-duplicate-file-in-system.md)
- [611.Valid-Triangle-Number](https://wentao-shao.gitbook.io/leetcode/array/611.valid-triangle-number.md)
- [621.Task-Scheduler](https://wentao-shao.gitbook.io/leetcode/array/621.task-scheduler.md)
- [628.Maximum-Product-of-Three-Numbers](https://wentao-shao.gitbook.io/leetcode/array/628.maximum-product-of-three-numbers.md)
- [632.Smallest-Range-Covering-Elements-from-K-Lists](https://wentao-shao.gitbook.io/leetcode/array/632.smallest-range-covering-elements-from-k-lists.md)
- [659.Split-Array-into-Consecutive-Subsequences](https://wentao-shao.gitbook.io/leetcode/array/659.split-array-into-consecutive-subsequences.md)
- [67.Add-Binary](https://wentao-shao.gitbook.io/leetcode/array/67.add-binary.md)
- [670.Maximum-Swap](https://wentao-shao.gitbook.io/leetcode/array/670.maximum-swap.md)
- [7.Reverse-Integer](https://wentao-shao.gitbook.io/leetcode/array/7.reverse-integer.md)
- [717.1-bit-and-2-bit-Characters](https://wentao-shao.gitbook.io/leetcode/array/717.1-bit-and-2-bit-characters.md)
- [722.Remove-Comments](https://wentao-shao.gitbook.io/leetcode/array/722.remove-comments.md)
- [724.Find-Pivot-Index](https://wentao-shao.gitbook.io/leetcode/array/724.find-pivot-index.md)
- [763.Partition-Labels](https://wentao-shao.gitbook.io/leetcode/array/763.partition-labels.md)
- [811.Subdomain-Visit-Count](https://wentao-shao.gitbook.io/leetcode/array/811.subdomain-visit-count.md)
- [845.Longest-Mountain-in-Array](https://wentao-shao.gitbook.io/leetcode/array/845.longest-mountain-in-array.md)
- [846.Hand-of-Straights](https://wentao-shao.gitbook.io/leetcode/array/846.hand-of-straights.md)
- [862.Shortest-Subarray-with-Sum-at-Least-K](https://wentao-shao.gitbook.io/leetcode/array/862.shortest-subarray-with-sum-at-least-k.md)
- [866.Prime-Palindrome](https://wentao-shao.gitbook.io/leetcode/array/866.prime-palindrome.md)
- [881.Boats-to-Save-People](https://wentao-shao.gitbook.io/leetcode/array/881.boats-to-save-people.md)
- [937.Reorder-Data-in-Log-Files](https://wentao-shao.gitbook.io/leetcode/array/937.reorder-data-in-log-files.md)
- [953.Verifying-an-Alien-Dictionary](https://wentao-shao.gitbook.io/leetcode/array/953.verifying-an-alien-dictionary.md)
- [957.Prison-Cells-After-N-Days](https://wentao-shao.gitbook.io/leetcode/array/957.prison-cells-after-n-days.md)
- [973.K-Closest-Points-to-Origin](https://wentao-shao.gitbook.io/leetcode/array/973.k-closest-points-to-origin.md)
- [974.Subarray-Sums-Divisible-by-K](https://wentao-shao.gitbook.io/leetcode/array/974.subarray-sums-divisible-by-k.md)
- [995.Minimum-Number-of-K-Consecutive-Bit-Flips](https://wentao-shao.gitbook.io/leetcode/array/995.minimum-number-of-k-consecutive-bit-flips.md)
- [Interleaving Positive And Negative Numbers](https://wentao-shao.gitbook.io/leetcode/array/interleaving-positive-and-negative-numbers.md)
- [Maximum Subarray Difference](https://wentao-shao.gitbook.io/leetcode/array/maximum-subarray-difference.md)
- [Maximum Subarray Ii](https://wentao-shao.gitbook.io/leetcode/array/maximum-subarray-ii.md)
- [Merge Sorted Array Ii](https://wentao-shao.gitbook.io/leetcode/array/merge-sorted-array-ii.md)
- [Minimum Subarray](https://wentao-shao.gitbook.io/leetcode/array/minimum-subarray.md)
- [Partition Array](https://wentao-shao.gitbook.io/leetcode/array/partition-array.md)
- [Recover Rotated Sorted Array](https://wentao-shao.gitbook.io/leetcode/array/recover-rotated-sorted-array.md)
- [Subarray Sum Closest](https://wentao-shao.gitbook.io/leetcode/array/subarray-sum-closest.md)
- [Subarray Sum Zero](https://wentao-shao.gitbook.io/leetcode/array/subarray-sum-zero.md)
- [Basic Knowledge](https://wentao-shao.gitbook.io/leetcode/basic-knowledge.md)
- [Binary Tree](https://wentao-shao.gitbook.io/leetcode/basic-knowledge/binary-tree.md)
- [Bit Operation](https://wentao-shao.gitbook.io/leetcode/basic-knowledge/bit-operation.md)
- [Heapify](https://wentao-shao.gitbook.io/leetcode/basic-knowledge/heapify.md)
- [Java Syntax](https://wentao-shao.gitbook.io/leetcode/basic-knowledge/java-syntax.md)
- [Monotonous Stack](https://wentao-shao.gitbook.io/leetcode/basic-knowledge/monotonous-stack.md)
- [Trie Tree](https://wentao-shao.gitbook.io/leetcode/basic-knowledge/trie-tree.md)
- [Binary Search](https://wentao-shao.gitbook.io/leetcode/binary-search.md)
- [1011.Capacity-To-Ship-Packages-Within-D-Days](https://wentao-shao.gitbook.io/leetcode/binary-search/1011.capacity-to-ship-packages-within-d-days.md)
- [1044.Longest-Duplicate-Substring](https://wentao-shao.gitbook.io/leetcode/binary-search/1044.longest-duplicate-substring.md)
- [1062.Longest-Repeating-Substring](https://wentao-shao.gitbook.io/leetcode/binary-search/1062.longest-repeating-substring.md)
- [153.Find-Minimum-in-Rotated-Sorted-Array](https://wentao-shao.gitbook.io/leetcode/binary-search/153.find-minimum-in-rotated-sorted-array.md)
- [162.Find-Peak-Element](https://wentao-shao.gitbook.io/leetcode/binary-search/162.find-peak-element.md)
- [278.First-Bad-Version](https://wentao-shao.gitbook.io/leetcode/binary-search/278.first-bad-version.md)
- [33.Search-in-Rotated-Sorted-Array](https://wentao-shao.gitbook.io/leetcode/binary-search/33.search-in-rotated-sorted-array.md)
- [34.Find-First-and-Last-Position-of-Element-in-Sorted-Array](https://wentao-shao.gitbook.io/leetcode/binary-search/34.find-first-and-last-position-of-element-in-sorted-array.md)
- [35.Search-Insert-Position](https://wentao-shao.gitbook.io/leetcode/binary-search/35.search-insert-position.md)
- [\[50.Pow(x,-n)\](Binary-Search/50.Pow(x,-n).md)](https://wentao-shao.gitbook.io/leetcode/binary-search/50.pow-x-n-binary-search-50.pow-x-n--md.md)
- [\[69.Sqrt(x)\](Binary-Search/69.Sqrt(x).md)](https://wentao-shao.gitbook.io/leetcode/binary-search/69.sqrt-x-binary-search-69.sqrt-x--md.md)
- [704.Binary-Search](https://wentao-shao.gitbook.io/leetcode/binary-search/704.binary-search.md)
- [74.Search-a-2D-Matrix](https://wentao-shao.gitbook.io/leetcode/binary-search/74.search-a-2d-matrix.md)
- [785.Is-Graph-Bipartite?](https://wentao-shao.gitbook.io/leetcode/binary-search/785.is-graph-bipartite.md)
- [796.Rotate-String](https://wentao-shao.gitbook.io/leetcode/binary-search/796.rotate-string.md)
- [81.Search-in-Rotated-Sorted-Array-II](https://wentao-shao.gitbook.io/leetcode/binary-search/81.search-in-rotated-sorted-array-ii.md)
- [Count Of Smaller Number](https://wentao-shao.gitbook.io/leetcode/binary-search/count-of-smaller-number.md)
- [Median](https://wentao-shao.gitbook.io/leetcode/binary-search/median.md)
- [Search In A Big Sorted Array](https://wentao-shao.gitbook.io/leetcode/binary-search/search-in-a-big-sorted-array.md)
- [Binary Tree](https://wentao-shao.gitbook.io/leetcode/binary-tree.md)
- [Serialize And Deserialize](https://wentao-shao.gitbook.io/leetcode/binary-tree/serialize-and-deserialize.md)
- [297.Serialize-and-Deserialize-Binary-Tree](https://wentao-shao.gitbook.io/leetcode/binary-tree/serialize-and-deserialize/297.serialize-and-deserialize-binary-tree.md)
- [428.Serialize-and-Deserialize-N-ary-Tree](https://wentao-shao.gitbook.io/leetcode/binary-tree/serialize-and-deserialize/428.serialize-and-deserialize-n-ary-tree.md)
- [449.Serialize-and-Deserialize-BST](https://wentao-shao.gitbook.io/leetcode/binary-tree/serialize-and-deserialize/449.serialize-and-deserialize-bst.md)
- [100.Same-Tree](https://wentao-shao.gitbook.io/leetcode/binary-tree/100.same-tree.md)
- [101.Symmetric-Tree](https://wentao-shao.gitbook.io/leetcode/binary-tree/101.symmetric-tree.md)
- [1038.Binary-Search-Tree-to-Greater-Sum-Tree](https://wentao-shao.gitbook.io/leetcode/binary-tree/1038.binary-search-tree-to-greater-sum-tree.md)
- [105.Construct-Binary-Tree-from-Preorder-and-Inorder-Traversal](https://wentao-shao.gitbook.io/leetcode/binary-tree/105.construct-binary-tree-from-preorder-and-inorder-traversal.md)
- [106.Construct-Binary-Tree-from-Inorder-and-Postorder-Traversal](https://wentao-shao.gitbook.io/leetcode/binary-tree/106.construct-binary-tree-from-inorder-and-postorder-traversal.md)
- [108.Convert-Sorted-Array-to-Binary-Search-Tree](https://wentao-shao.gitbook.io/leetcode/binary-tree/108.convert-sorted-array-to-binary-search-tree.md)
- [1110.Delete-Nodes-And-Return-Forest](https://wentao-shao.gitbook.io/leetcode/binary-tree/1110.delete-nodes-and-return-forest.md)
- [114.Flatten-Binary-Tree-to-Linked-List](https://wentao-shao.gitbook.io/leetcode/binary-tree/114.flatten-binary-tree-to-linked-list.md)
- [1145.Binary-Tree-Coloring-Game](https://wentao-shao.gitbook.io/leetcode/binary-tree/1145.binary-tree-coloring-game.md)
- [116.Populating-Next-Right-Pointers-in-Each-Node](https://wentao-shao.gitbook.io/leetcode/binary-tree/116.populating-next-right-pointers-in-each-node.md)
- [117.Populating-Next-Right-Pointers-in-Each-Node-II](https://wentao-shao.gitbook.io/leetcode/binary-tree/117.populating-next-right-pointers-in-each-node-ii.md)
- [129.Sum-Root-to-Leaf-Numbers](https://wentao-shao.gitbook.io/leetcode/binary-tree/129.sum-root-to-leaf-numbers.md)
- [144.Binary-Tree-Preorder-Traversal](https://wentao-shao.gitbook.io/leetcode/binary-tree/144.binary-tree-preorder-traversal.md)
- [199.Binary-Tree-Right-Side-View](https://wentao-shao.gitbook.io/leetcode/binary-tree/199.binary-tree-right-side-view.md)
- [222.Count-Complete-Tree-Nodes](https://wentao-shao.gitbook.io/leetcode/binary-tree/222.count-complete-tree-nodes.md)
- [226.Invert-Binary-Tree](https://wentao-shao.gitbook.io/leetcode/binary-tree/226.invert-binary-tree.md)
- [230.Kth-Smallest-Element-in-a-BST](https://wentao-shao.gitbook.io/leetcode/binary-tree/230.kth-smallest-element-in-a-bst.md)
- [257.Binary-Tree-Paths](https://wentao-shao.gitbook.io/leetcode/binary-tree/257.binary-tree-paths.md)
- [270.Closest-Binary-Search-Tree-Value](https://wentao-shao.gitbook.io/leetcode/binary-tree/270.closest-binary-search-tree-value.md)
- [285.Inorder-Successor-in-BST](https://wentao-shao.gitbook.io/leetcode/binary-tree/285.inorder-successor-in-bst.md)
- [337.House-Robber-III](https://wentao-shao.gitbook.io/leetcode/binary-tree/337.house-robber-iii.md)
- [426.Convert-Binary-Search-Tree-to-Sorted-Doubly-Linked-List](https://wentao-shao.gitbook.io/leetcode/binary-tree/426.convert-binary-search-tree-to-sorted-doubly-linked-list.md)
- [510.Inorder-Successor-in-BST-II](https://wentao-shao.gitbook.io/leetcode/binary-tree/510.inorder-successor-in-bst-ii.md)
- [543.Diameter-of-Binary-Tree](https://wentao-shao.gitbook.io/leetcode/binary-tree/543.diameter-of-binary-tree.md)
- [617.Merge-Two-Binary-Trees](https://wentao-shao.gitbook.io/leetcode/binary-tree/617.merge-two-binary-trees.md)
- [652.Find-Duplicate-Subtrees](https://wentao-shao.gitbook.io/leetcode/binary-tree/652.find-duplicate-subtrees.md)
- [653.Two-Sum-IV---Input-is-a-BST](https://wentao-shao.gitbook.io/leetcode/binary-tree/653.two-sum-iv-input-is-a-bst.md)
- [662.Maximum-Width-of-Binary-Tree](https://wentao-shao.gitbook.io/leetcode/binary-tree/662.maximum-width-of-binary-tree.md)
- [669.Trim-a-Binary-Search-Tree](https://wentao-shao.gitbook.io/leetcode/binary-tree/669.trim-a-binary-search-tree.md)
- [889.Construct-Binary-Tree-from-Preorder-and-Postorder-Traversal](https://wentao-shao.gitbook.io/leetcode/binary-tree/889.construct-binary-tree-from-preorder-and-postorder-traversal.md)
- [938.Range-Sum-of-BST](https://wentao-shao.gitbook.io/leetcode/binary-tree/938.range-sum-of-bst.md)
- [94.Binary-Tree-Inorder-Traversal](https://wentao-shao.gitbook.io/leetcode/binary-tree/94.binary-tree-inorder-traversal.md)
- [951.Flip-Equivalent-Binary-Trees](https://wentao-shao.gitbook.io/leetcode/binary-tree/951.flip-equivalent-binary-trees.md)
- [958.Check-Completeness-of-a-Binary-Tree](https://wentao-shao.gitbook.io/leetcode/binary-tree/958.check-completeness-of-a-binary-tree.md)
- [979.Distribute-Coins-in-Binary-Tree](https://wentao-shao.gitbook.io/leetcode/binary-tree/979.distribute-coins-in-binary-tree.md)
- [987.Vertical-Order-Traversal-of-a-Binary-Tree](https://wentao-shao.gitbook.io/leetcode/binary-tree/987.vertical-order-traversal-of-a-binary-tree.md)
- [Search Range In Binary Search Tree](https://wentao-shao.gitbook.io/leetcode/binary-tree/search-range-in-binary-search-tree.md)
- [Bit](https://wentao-shao.gitbook.io/leetcode/bit.md)
- [307.Range-Sum-Query---Mutable](https://wentao-shao.gitbook.io/leetcode/bit/307.range-sum-query-mutable.md)
- [308.Range-Sum-Query-2D---Mutable](https://wentao-shao.gitbook.io/leetcode/bit/308.range-sum-query-2d-mutable.md)
- [315.Count-of-Smaller-Numbers-After-Self](https://wentao-shao.gitbook.io/leetcode/bit/315.count-of-smaller-numbers-after-self.md)
- [493.Reverse-Pairs](https://wentao-shao.gitbook.io/leetcode/bit/493.reverse-pairs.md)
- [Data Structure](https://wentao-shao.gitbook.io/leetcode/data-structure.md)
- [Basic Calculator](https://wentao-shao.gitbook.io/leetcode/data-structure/basic-calculator.md)
- [224.Basic-Calculator](https://wentao-shao.gitbook.io/leetcode/data-structure/basic-calculator/224.basic-calculator.md)
- [227.Basic-Calculator-II](https://wentao-shao.gitbook.io/leetcode/data-structure/basic-calculator/227.basic-calculator-ii.md)
- [772.Basic-Calculator-III](https://wentao-shao.gitbook.io/leetcode/data-structure/basic-calculator/772.basic-calculator-iii.md)
- [Basic Claculator Iv](https://wentao-shao.gitbook.io/leetcode/data-structure/basic-calculator/basic-claculator-iv.md)
- [1146.Snapshot-Array](https://wentao-shao.gitbook.io/leetcode/data-structure/1146.snapshot-array.md)
- [1152.Analyze-User-Website-Visit-Pattern](https://wentao-shao.gitbook.io/leetcode/data-structure/1152.analyze-user-website-visit-pattern.md)
- [1167.Minimum-Cost-to-Connect-Sticks](https://wentao-shao.gitbook.io/leetcode/data-structure/1167.minimum-cost-to-connect-sticks.md)
- [1172.Dinner-Plate-Stacks](https://wentao-shao.gitbook.io/leetcode/data-structure/1172.dinner-plate-stacks.md)
- [1236.Web-Crawler](https://wentao-shao.gitbook.io/leetcode/data-structure/1236.web-crawler.md)
- [128.Longest-Consecutive-Sequence](https://wentao-shao.gitbook.io/leetcode/data-structure/128.longest-consecutive-sequence.md)
- [146.LRU-Cache](https://wentao-shao.gitbook.io/leetcode/data-structure/146.lru-cache.md)
- [155.Min-Stack](https://wentao-shao.gitbook.io/leetcode/data-structure/155.min-stack.md)
- [158.Read-N-Characters-Given-Read4-II---Call-multiple-times](https://wentao-shao.gitbook.io/leetcode/data-structure/158.read-n-characters-given-read4-ii-call-multiple-times.md)
- [225.Implement-Stack-using-Queues](https://wentao-shao.gitbook.io/leetcode/data-structure/225.implement-stack-using-queues.md)
- [232.Implement-Queue-using-Stacks](https://wentao-shao.gitbook.io/leetcode/data-structure/232.implement-queue-using-stacks.md)
- [253.Meeting-Rooms-II](https://wentao-shao.gitbook.io/leetcode/data-structure/253.meeting-rooms-ii.md)
- [263.Ugly-Number](https://wentao-shao.gitbook.io/leetcode/data-structure/263.ugly-number.md)
- [271.Encode-and-Decode-Strings](https://wentao-shao.gitbook.io/leetcode/data-structure/271.encode-and-decode-strings.md)
- [\[28.Implement-strStr()\](Data-Structure/28.Implement-strStr().md)](https://wentao-shao.gitbook.io/leetcode/data-structure/28.implement-strstr-data-structure-28.implement-strstr--md.md)
- [281.Zigzag-Iterator](https://wentao-shao.gitbook.io/leetcode/data-structure/281.zigzag-iterator.md)
- [284.Peeking-Iterator](https://wentao-shao.gitbook.io/leetcode/data-structure/284.peeking-iterator.md)
- [295.Find-Median-from-Data-Stream](https://wentao-shao.gitbook.io/leetcode/data-structure/295.find-median-from-data-stream.md)
- [314.Binary-Tree-Vertical-Order-Traversal](https://wentao-shao.gitbook.io/leetcode/data-structure/314.binary-tree-vertical-order-traversal.md)
- [332.Reconstruct-Itinerary](https://wentao-shao.gitbook.io/leetcode/data-structure/332.reconstruct-itinerary.md)
- [341.Flatten-Nested-List-Iterator](https://wentao-shao.gitbook.io/leetcode/data-structure/341.flatten-nested-list-iterator.md)
- [346.Moving-Average-from-Data-Stream](https://wentao-shao.gitbook.io/leetcode/data-structure/346.moving-average-from-data-stream.md)
- [348.Design-Tic-Tac-Toe](https://wentao-shao.gitbook.io/leetcode/data-structure/348.design-tic-tac-toe.md)
- [353.Design-Snake-Game](https://wentao-shao.gitbook.io/leetcode/data-structure/353.design-snake-game.md)
- [359.Logger-Rate-Limiter](https://wentao-shao.gitbook.io/leetcode/data-structure/359.logger-rate-limiter.md)
- [362.Design-Hit-Counter](https://wentao-shao.gitbook.io/leetcode/data-structure/362.design-hit-counter.md)
- [\[380.Insert-Delete-GetRandom-O(1)\](Data-Structure/380.Insert-Delete-GetRandom-O(1).md)](https://wentao-shao.gitbook.io/leetcode/data-structure/380.insert-delete-getrandom-o-1-data-structure-380.insert-delete-getrandom-o-1--md.md)
- [\[381.Insert-Delete-GetRandom-O(1)---Duplicates-allowed\](Data-Structure/381.Insert-Delete-GetRandom-O](https://wentao-shao.gitbook.io/leetcode/data-structure/381.insert-delete-getrandom-o-1-duplicates-allowed-data-structure-381.insert-delete-getrandom-o-1-du.md)
- [384.Shuffle-an-Array](https://wentao-shao.gitbook.io/leetcode/data-structure/384.shuffle-an-array.md)
- [41.First-Missing-Positive](https://wentao-shao.gitbook.io/leetcode/data-structure/41.first-missing-positive.md)
- [460.LFU-Cache](https://wentao-shao.gitbook.io/leetcode/data-structure/460.lfu-cache.md)
- [\[470.Implement-Rand10()-Using-Rand7()\](Data-Structure/470.Implement-Rand10()-Using-Rand7().md)](https://wentao-shao.gitbook.io/leetcode/data-structure/470.implement-rand10-using-rand7-data-structure-470.implement-rand10-using-rand7--md.md)
- [49.Group-Anagrams](https://wentao-shao.gitbook.io/leetcode/data-structure/49.group-anagrams.md)
- [523.Continuous-Subarray-Sum](https://wentao-shao.gitbook.io/leetcode/data-structure/523.continuous-subarray-sum.md)
- [528.Random-Pick-with-Weight](https://wentao-shao.gitbook.io/leetcode/data-structure/528.random-pick-with-weight.md)
- [535.Encode-and-Decode-TinyURL](https://wentao-shao.gitbook.io/leetcode/data-structure/535.encode-and-decode-tinyurl.md)
- [545.Boundary-of-Binary-Tree](https://wentao-shao.gitbook.io/leetcode/data-structure/545.boundary-of-binary-tree.md)
- [572.Subtree-of-Another-Tree](https://wentao-shao.gitbook.io/leetcode/data-structure/572.subtree-of-another-tree.md)
- [588.Design-In-Memory-File-System](https://wentao-shao.gitbook.io/leetcode/data-structure/588.design-in-memory-file-system.md)
- [622.Design-Circular-Queue](https://wentao-shao.gitbook.io/leetcode/data-structure/622.design-circular-queue.md)
- [642.Design-Search-Autocomplete-System](https://wentao-shao.gitbook.io/leetcode/data-structure/642.design-search-autocomplete-system.md)
- [692.Top-K-Frequent-Words](https://wentao-shao.gitbook.io/leetcode/data-structure/692.top-k-frequent-words.md)
- [706.Design-HashMap](https://wentao-shao.gitbook.io/leetcode/data-structure/706.design-hashmap.md)
- [707.Design-Linked-List](https://wentao-shao.gitbook.io/leetcode/data-structure/707.design-linked-list.md)
- [729.My-Calendar-I](https://wentao-shao.gitbook.io/leetcode/data-structure/729.my-calendar-i.md)
- [731.My-Calendar-II](https://wentao-shao.gitbook.io/leetcode/data-structure/731.my-calendar-ii.md)
- [759.Employee-Free-Time](https://wentao-shao.gitbook.io/leetcode/data-structure/759.employee-free-time.md)
- [794.Valid-Tic-Tac-Toe-State](https://wentao-shao.gitbook.io/leetcode/data-structure/794.valid-tic-tac-toe-state.md)
- [84.Largest-Rectangle-in-Histogram](https://wentao-shao.gitbook.io/leetcode/data-structure/84.largest-rectangle-in-histogram.md)
- [843.Guess-the-Word](https://wentao-shao.gitbook.io/leetcode/data-structure/843.guess-the-word.md)
- [900.RLE-Iterator](https://wentao-shao.gitbook.io/leetcode/data-structure/900.rle-iterator.md)
- [937.Reorder-Data-in-Log-Files](https://wentao-shao.gitbook.io/leetcode/data-structure/937.reorder-data-in-log-files.md)
- [981.Time-Based-Key-Value-Store](https://wentao-shao.gitbook.io/leetcode/data-structure/981.time-based-key-value-store.md)
- [99.Recover-Binary-Search-Tree](https://wentao-shao.gitbook.io/leetcode/data-structure/99.recover-binary-search-tree.md)
- [Add And Search Word Data Structure Design](https://wentao-shao.gitbook.io/leetcode/data-structure/add-and-search-word-data-structure-design.md)
- [Heapify](https://wentao-shao.gitbook.io/leetcode/data-structure/heapify.md)
- [Max Tree](https://wentao-shao.gitbook.io/leetcode/data-structure/max-tree.md)
- [Rehashing](https://wentao-shao.gitbook.io/leetcode/data-structure/rehashing.md)
- [Subarray Sum Zero](https://wentao-shao.gitbook.io/leetcode/data-structure/subarray-sum-zero.md)
- [Divide Conquer](https://wentao-shao.gitbook.io/leetcode/divide-conquer.md)
- [102.Binary-Tree-Level-Order-Traversal](https://wentao-shao.gitbook.io/leetcode/divide-conquer/102.binary-tree-level-order-traversal.md)
- [103.Binary-Tree-Zigzag-Level-Order-Traversal](https://wentao-shao.gitbook.io/leetcode/divide-conquer/103.binary-tree-zigzag-level-order-traversal.md)
- [104.Maximum-Depth-of-Binary-Tree](https://wentao-shao.gitbook.io/leetcode/divide-conquer/104.maximum-depth-of-binary-tree.md)
- [107.Binary-Tree-Level-Order-Traversal-II](https://wentao-shao.gitbook.io/leetcode/divide-conquer/107.binary-tree-level-order-traversal-ii.md)
- [110.Balanced-Binary-Tree](https://wentao-shao.gitbook.io/leetcode/divide-conquer/110.balanced-binary-tree.md)
- [124.Binary-Tree-Maximum-Path-Sum](https://wentao-shao.gitbook.io/leetcode/divide-conquer/124.binary-tree-maximum-path-sum.md)
- [173.Binary-Search-Tree-Iterator](https://wentao-shao.gitbook.io/leetcode/divide-conquer/173.binary-search-tree-iterator.md)
- [218.The-Skyline-Problem](https://wentao-shao.gitbook.io/leetcode/divide-conquer/218.the-skyline-problem.md)
- [236.Lowest-Common-Ancestor-of-a-Binary-Tree](https://wentao-shao.gitbook.io/leetcode/divide-conquer/236.lowest-common-ancestor-of-a-binary-tree.md)
- [450.Delete-Node-in-a-BST](https://wentao-shao.gitbook.io/leetcode/divide-conquer/450.delete-node-in-a-bst.md)
- [973.K-Closest-Points-to-Origin](https://wentao-shao.gitbook.io/leetcode/divide-conquer/973.k-closest-points-to-origin.md)
- [98.Validate-Binary-Search-Tree](https://wentao-shao.gitbook.io/leetcode/divide-conquer/98.validate-binary-search-tree.md)
- [Inorder](https://wentao-shao.gitbook.io/leetcode/divide-conquer/inorder.md)
- [Insert Node In A Binary Search Tree](https://wentao-shao.gitbook.io/leetcode/divide-conquer/insert-node-in-a-binary-search-tree.md)
- [Postorder](https://wentao-shao.gitbook.io/leetcode/divide-conquer/postorder.md)
- [Preorder](https://wentao-shao.gitbook.io/leetcode/divide-conquer/preorder.md)
- [Dynamic Programming](https://wentao-shao.gitbook.io/leetcode/dynamic-programming.md)
- [1.position](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/1.position.md)
- [1048.Longest-String-Chain](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/1.position/1048.longest-string-chain.md)
- [198.House-Robber](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/1.position/198.house-robber.md)
- [256.Paint-House](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/1.position/256.paint-house.md)
- [265.Paint-House-II](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/1.position/265.paint-house-ii.md)
- [32.Longest-Valid-Parentheses](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/1.position/32.longest-valid-parentheses.md)
- [338.Counting-Bits](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/1.position/338.counting-bits.md)
- [361.Bomb-Enemy](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/1.position/361.bomb-enemy.md)
- [403.Frog-Jump](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/1.position/403.frog-jump.md)
- [45.Jump-Game-II](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/1.position/45.jump-game-ii.md)
- [518.Coin-Change-2](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/1.position/518.coin-change-2.md)
- [55.Jump-Game](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/1.position/55.jump-game.md)
- [62.Unique-Paths](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/1.position/62.unique-paths.md)
- [63.Unique-Paths-II](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/1.position/63.unique-paths-ii.md)
- [64.Minimum-Path-Sum](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/1.position/64.minimum-path-sum.md)
- [70.Climbing-Stairs](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/1.position/70.climbing-stairs.md)
- [72.Edit-Distance](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/1.position/72.edit-distance.md)
- [85.Maximal-Rectangle](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/1.position/85.maximal-rectangle.md)
- [871.Minimum-Number-of-Refueling-Stops](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/1.position/871.minimum-number-of-refueling-stops.md)
- [91.Decode-Ways](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/1.position/91.decode-ways.md)
- [97.Interleaving-String](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/1.position/97.interleaving-string.md)
- [980.Unique-Paths-III](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/1.position/980.unique-paths-iii.md)
- [2.sequence](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/2.sequence.md)
- [Sell Stock](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/2.sequence/sell-stock.md)
- [188.Best-Time-to-Buy-and-Sell-Stock-IV](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/2.sequence/sell-stock/188.best-time-to-buy-and-sell-stock-iv.md)
- [309.Best-Time-to-Buy-and-Sell-Stock-with-Cooldown](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/2.sequence/sell-stock/309.best-time-to-buy-and-sell-stock-with-cooldown.md)
- [115.Distinct-Subsequences](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/2.sequence/115.distinct-subsequences.md)
- [132.Palindrome-Partitioning-II](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/2.sequence/132.palindrome-partitioning-ii.md)
- [300.Longest-Increasing-Subsequence](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/2.sequence/300.longest-increasing-subsequence.md)
- [472.Concatenated-Words](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/2.sequence/472.concatenated-words.md)
- [516.Longest-Palindromic-Subsequence](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/2.sequence/516.longest-palindromic-subsequence.md)
- [727.Minimum-Window-Subsequence](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/2.sequence/727.minimum-window-subsequence.md)
- [801.Minimum-Swaps-To-Make-Sequences-Increasing](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/2.sequence/801.minimum-swaps-to-make-sequences-increasing.md)
- [K Sum](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/2.sequence/k-sum.md)
- [Long Common Sequence](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/2.sequence/long-common-sequence.md)
- [Maximum Subarray Iii](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/2.sequence/maximum-subarray-iii.md)
- [Minimum Adjustment Cost](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/2.sequence/minimum-adjustment-cost.md)
- [Backpack Problem](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/backpack-problem.md)
- [1155.Number-of-Dice-Rolls-With-Target-Sum](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/backpack-problem/1155.number-of-dice-rolls-with-target-sum.md)
- [322.Coin-Change](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/backpack-problem/322.coin-change.md)
- [416.Partition-Equal-Subset-Sum](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/backpack-problem/416.partition-equal-subset-sum.md)
- [Backpack Ii](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/backpack-problem/backpack-ii.md)
- [Backpack Iii](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/backpack-problem/backpack-iii.md)
- [Backpack](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/backpack-problem/backpack.md)
- [区间型](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/qu-jian-xing.md)
- [1000.Minimum-Cost-to-Merge-Stones](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/qu-jian-xing/1000.minimum-cost-to-merge-stones.md)
- [1335.Minimum-Difficulty-of-a-Job-Schedule](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/qu-jian-xing/1335.minimum-difficulty-of-a-job-schedule.md)
- [375.Guess-Number-Higher-or-Lower-II](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/qu-jian-xing/375.guess-number-higher-or-lower-ii.md)
- [87.Scramble-String](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/qu-jian-xing/87.scramble-string.md)
- [Coins In A Line Iii](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/qu-jian-xing/coins-in-a-line-iii.md)
- [矩阵坐标](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/ju-zhen-zuo-biao.md)
- [1277.Count-Square-Submatrices-with-All-Ones](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/ju-zhen-zuo-biao/1277.count-square-submatrices-with-all-ones.md)
- [221.Maximal-Square](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/ju-zhen-zuo-biao/221.maximal-square.md)
- [741.Cherry-Pickup](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/ju-zhen-zuo-biao/741.cherry-pickup.md)
- [1049.Last-Stone-Weight-II](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/1049.last-stone-weight-ii.md)
- [1140.Stone-Game-II](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/1140.stone-game-ii.md)
- [1235.Maximum-Profit-in-Job-Scheduling](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/1235.maximum-profit-in-job-scheduling.md)
- [1320.Minimum-Distance-to-Type-a-Word-Using-Two-Fingers](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/1320.minimum-distance-to-type-a-word-using-two-fingers.md)
- [1406.Stone-Game-III](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/1406.stone-game-iii.md)
- [774.Minimize-Max-Distance-to-Gas-Station](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/774.minimize-max-distance-to-gas-station.md)
- [Longest Arithmetic Sequence](https://wentao-shao.gitbook.io/leetcode/dynamic-programming/longest-arithmetic-sequence.md)
- [Graph Search](https://wentao-shao.gitbook.io/leetcode/graph-search.md)
- [Word Ladder](https://wentao-shao.gitbook.io/leetcode/graph-search/word-ladder.md)
- [126.Word-Ladder-II](https://wentao-shao.gitbook.io/leetcode/graph-search/word-ladder/126.word-ladder-ii.md)
- [127.Word-Ladder](https://wentao-shao.gitbook.io/leetcode/graph-search/word-ladder/127.word-ladder.md)
- [10.Regular-Expression-Matching](https://wentao-shao.gitbook.io/leetcode/graph-search/10.regular-expression-matching.md)
- [1041.Robot-Bounded-In-Circle](https://wentao-shao.gitbook.io/leetcode/graph-search/1041.robot-bounded-in-circle.md)
- [1066.Campus-Bikes-II](https://wentao-shao.gitbook.io/leetcode/graph-search/1066.campus-bikes-ii.md)
- [1087.Brace-Expansion](https://wentao-shao.gitbook.io/leetcode/graph-search/1087.brace-expansion.md)
- [1102.Path-With-Maximum-Minimum-Value](https://wentao-shao.gitbook.io/leetcode/graph-search/1102.path-with-maximum-minimum-value.md)
- [113.Path-Sum-II](https://wentao-shao.gitbook.io/leetcode/graph-search/113.path-sum-ii.md)
- [1192.Critical-Connections-in-a-Network](https://wentao-shao.gitbook.io/leetcode/graph-search/1192.critical-connections-in-a-network.md)
- [1197.Minimum-Knight-Moves](https://wentao-shao.gitbook.io/leetcode/graph-search/1197.minimum-knight-moves.md)
- [1219.Path-with-Maximum-Gold](https://wentao-shao.gitbook.io/leetcode/graph-search/1219.path-with-maximum-gold.md)
- [1239.Maximum-Length-of-a-Concatenated-String-with-Unique-Characters](https://wentao-shao.gitbook.io/leetcode/graph-search/1239.maximum-length-of-a-concatenated-string-with-unique-characters.md)
- [1284.Minimum-Number-of-Flips-to-Convert-Binary-Matrix-to-Zero-Matrix](https://wentao-shao.gitbook.io/leetcode/graph-search/1284.minimum-number-of-flips-to-convert-binary-matrix-to-zero-matrix.md)
- [1293.Shortest-Path-in-a-Grid-with-Obstacles-Elimination](https://wentao-shao.gitbook.io/leetcode/graph-search/1293.shortest-path-in-a-grid-with-obstacles-elimination.md)
- [131.Palindrome-Partitioning](https://wentao-shao.gitbook.io/leetcode/graph-search/131.palindrome-partitioning.md)
- [133.Clone-Graph](https://wentao-shao.gitbook.io/leetcode/graph-search/133.clone-graph.md)
- [1345.Jump-Game-IV](https://wentao-shao.gitbook.io/leetcode/graph-search/1345.jump-game-iv.md)
- [1376.Time-Needed-to-Inform-All-Employees](https://wentao-shao.gitbook.io/leetcode/graph-search/1376.time-needed-to-inform-all-employees.md)
- [139.Word-Break](https://wentao-shao.gitbook.io/leetcode/graph-search/139.word-break.md)
- [140.Word-Break-II](https://wentao-shao.gitbook.io/leetcode/graph-search/140.word-break-ii.md)
- [1416.Restore-The-Array](https://wentao-shao.gitbook.io/leetcode/graph-search/1416.restore-the-array.md)
- [17.Letter-Combinations-of-a-Phone-Number](https://wentao-shao.gitbook.io/leetcode/graph-search/17.letter-combinations-of-a-phone-number.md)
- [179.Largest-Number](https://wentao-shao.gitbook.io/leetcode/graph-search/179.largest-number.md)
- [200.Number-of-Islands](https://wentao-shao.gitbook.io/leetcode/graph-search/200.number-of-islands.md)
- [212.Word-Search-II](https://wentao-shao.gitbook.io/leetcode/graph-search/212.word-search-ii.md)
- [22.Generate-Parentheses](https://wentao-shao.gitbook.io/leetcode/graph-search/22.generate-parentheses.md)
- [248.Strobogrammatic-Number-III](https://wentao-shao.gitbook.io/leetcode/graph-search/248.strobogrammatic-number-iii.md)
- [286.Walls-and-Gates](https://wentao-shao.gitbook.io/leetcode/graph-search/286.walls-and-gates.md)
- [289.Game-of-Life](https://wentao-shao.gitbook.io/leetcode/graph-search/289.game-of-life.md)
- [298.Binary-Tree-Longest-Consecutive-Sequence](https://wentao-shao.gitbook.io/leetcode/graph-search/298.binary-tree-longest-consecutive-sequence.md)
- [301.Remove-Invalid-Parentheses](https://wentao-shao.gitbook.io/leetcode/graph-search/301.remove-invalid-parentheses.md)
- [312.Burst-Balloons](https://wentao-shao.gitbook.io/leetcode/graph-search/312.burst-balloons.md)
- [317.Shortest-Distance-from-All-Buildings](https://wentao-shao.gitbook.io/leetcode/graph-search/317.shortest-distance-from-all-buildings.md)
- [320.Generalized-Abbreviation](https://wentao-shao.gitbook.io/leetcode/graph-search/320.generalized-abbreviation.md)
- [323.Number-of-Connected-Components-in-an-Undirected-Graph](https://wentao-shao.gitbook.io/leetcode/graph-search/323.number-of-connected-components-in-an-undirected-graph.md)
- [329.Longest-Increasing-Path-in-a-Matrix](https://wentao-shao.gitbook.io/leetcode/graph-search/329.longest-increasing-path-in-a-matrix.md)
- [364.Nested-List-Weight-Sum-II](https://wentao-shao.gitbook.io/leetcode/graph-search/364.nested-list-weight-sum-ii.md)
- [386.Lexicographical-Numbers](https://wentao-shao.gitbook.io/leetcode/graph-search/386.lexicographical-numbers.md)
- [39.Combination-Sum](https://wentao-shao.gitbook.io/leetcode/graph-search/39.combination-sum.md)
- [399.Evaluate-Division](https://wentao-shao.gitbook.io/leetcode/graph-search/399.evaluate-division.md)
- [40.Combination-Sum-II](https://wentao-shao.gitbook.io/leetcode/graph-search/40.combination-sum-ii.md)
- [417.Pacific-Atlantic-Water-Flow](https://wentao-shao.gitbook.io/leetcode/graph-search/417.pacific-atlantic-water-flow.md)
- [430.Flatten-a-Multilevel-Doubly-Linked-List](https://wentao-shao.gitbook.io/leetcode/graph-search/430.flatten-a-multilevel-doubly-linked-list.md)
- [437.Path-Sum-III](https://wentao-shao.gitbook.io/leetcode/graph-search/437.path-sum-iii.md)
- [44.Wildcard-Matching](https://wentao-shao.gitbook.io/leetcode/graph-search/44.wildcard-matching.md)
- [463.Island-Perimeter](https://wentao-shao.gitbook.io/leetcode/graph-search/463.island-perimeter.md)
- [465.Optimal-Account-Balancing](https://wentao-shao.gitbook.io/leetcode/graph-search/465.optimal-account-balancing.md)
- [489.Robot-Room-Cleaner](https://wentao-shao.gitbook.io/leetcode/graph-search/489.robot-room-cleaner.md)
- [490.The-Maze](https://wentao-shao.gitbook.io/leetcode/graph-search/490.the-maze.md)
- [494.Target-Sum](https://wentao-shao.gitbook.io/leetcode/graph-search/494.target-sum.md)
- [51.N-Queens](https://wentao-shao.gitbook.io/leetcode/graph-search/51.n-queens.md)
- [515.Find-Largest-Value-in-Each-Tree-Row](https://wentao-shao.gitbook.io/leetcode/graph-search/515.find-largest-value-in-each-tree-row.md)
- [524.Longest-Word-in-Dictionary-through-Deleting](https://wentao-shao.gitbook.io/leetcode/graph-search/524.longest-word-in-dictionary-through-deleting.md)
- [529.Minesweeper](https://wentao-shao.gitbook.io/leetcode/graph-search/529.minesweeper.md)
- [547.Number-of-Provinces](https://wentao-shao.gitbook.io/leetcode/graph-search/547.number-of-provinces.md)
- [568.Maximum-Vacation-Days](https://wentao-shao.gitbook.io/leetcode/graph-search/568.maximum-vacation-days.md)
- [675.Cut-Off-Trees-for-Golf-Event](https://wentao-shao.gitbook.io/leetcode/graph-search/675.cut-off-trees-for-golf-event.md)
- [679.24-Game](https://wentao-shao.gitbook.io/leetcode/graph-search/679.24-game.md)
- [695.Max-Area-of-Island](https://wentao-shao.gitbook.io/leetcode/graph-search/695.max-area-of-island.md)
- [698.Partition-to-K-Equal-Sum-Subsets](https://wentao-shao.gitbook.io/leetcode/graph-search/698.partition-to-k-equal-sum-subsets.md)
- [721.Accounts-Merge](https://wentao-shao.gitbook.io/leetcode/graph-search/721.accounts-merge.md)
- [733.Flood-Fill](https://wentao-shao.gitbook.io/leetcode/graph-search/733.flood-fill.md)
- [737.Sentence-Similarity-II](https://wentao-shao.gitbook.io/leetcode/graph-search/737.sentence-similarity-ii.md)
- [743.Network-Delay-Time](https://wentao-shao.gitbook.io/leetcode/graph-search/743.network-delay-time.md)
- [752.Open-the-Lock](https://wentao-shao.gitbook.io/leetcode/graph-search/752.open-the-lock.md)
- [753.Cracking-the-Safe](https://wentao-shao.gitbook.io/leetcode/graph-search/753.cracking-the-safe.md)
- [773.Sliding-Puzzle](https://wentao-shao.gitbook.io/leetcode/graph-search/773.sliding-puzzle.md)
- [79.Word-Search](https://wentao-shao.gitbook.io/leetcode/graph-search/79.word-search.md)
- [802.Find-Eventual-Safe-States](https://wentao-shao.gitbook.io/leetcode/graph-search/802.find-eventual-safe-states.md)
- [815.Bus-Routes](https://wentao-shao.gitbook.io/leetcode/graph-search/815.bus-routes.md)
- [818.Race-Car](https://wentao-shao.gitbook.io/leetcode/graph-search/818.race-car.md)
- [854.K-Similar-Strings](https://wentao-shao.gitbook.io/leetcode/graph-search/854.k-similar-strings.md)
- [863.All-Nodes-Distance-K-in-Binary-Tree](https://wentao-shao.gitbook.io/leetcode/graph-search/863.all-nodes-distance-k-in-binary-tree.md)
- [864.Shortest-Path-to-Get-All-Keys](https://wentao-shao.gitbook.io/leetcode/graph-search/864.shortest-path-to-get-all-keys.md)
- [909.Snakes-and-Ladders](https://wentao-shao.gitbook.io/leetcode/graph-search/909.snakes-and-ladders.md)
- [93.Restore-IP-Addresses](https://wentao-shao.gitbook.io/leetcode/graph-search/93.restore-ip-addresses.md)
- [95.Unique-Binary-Search-Trees-II](https://wentao-shao.gitbook.io/leetcode/graph-search/95.unique-binary-search-trees-ii.md)
- [96.Unique-Binary-Search-Trees](https://wentao-shao.gitbook.io/leetcode/graph-search/96.unique-binary-search-trees.md)
- [994.Rotting-Oranges](https://wentao-shao.gitbook.io/leetcode/graph-search/994.rotting-oranges.md)
- [Linked List](https://wentao-shao.gitbook.io/leetcode/linked-list.md)
- [Add Two Numbers](https://wentao-shao.gitbook.io/leetcode/linked-list/add-two-numbers.md)
- [2.Add-Two-Numbers](https://wentao-shao.gitbook.io/leetcode/linked-list/add-two-numbers/2.add-two-numbers.md)
- [445.Add-Two-Numbers-II](https://wentao-shao.gitbook.io/leetcode/linked-list/add-two-numbers/445.add-two-numbers-ii.md)
- [109.Convert-Sorted-List-to-Binary-Search-Tree](https://wentao-shao.gitbook.io/leetcode/linked-list/109.convert-sorted-list-to-binary-search-tree.md)
- [138.Copy-List-with-Random-Pointer](https://wentao-shao.gitbook.io/leetcode/linked-list/138.copy-list-with-random-pointer.md)
- [141.Linked-List-Cycle](https://wentao-shao.gitbook.io/leetcode/linked-list/141.linked-list-cycle.md)
- [142.Linked-List-Cycle-II](https://wentao-shao.gitbook.io/leetcode/linked-list/142.linked-list-cycle-ii.md)
- [143.Reorder-List](https://wentao-shao.gitbook.io/leetcode/linked-list/143.reorder-list.md)
- [148.Sort-List](https://wentao-shao.gitbook.io/leetcode/linked-list/148.sort-list.md)
- [160.Intersection-of-Two-Linked-Lists](https://wentao-shao.gitbook.io/leetcode/linked-list/160.intersection-of-two-linked-lists.md)
- [19.Remove-Nth-Node-From-End-of-List](https://wentao-shao.gitbook.io/leetcode/linked-list/19.remove-nth-node-from-end-of-list.md)
- [206.Reverse-Linked-List](https://wentao-shao.gitbook.io/leetcode/linked-list/206.reverse-linked-list.md)
- [21.Merge-Two-Sorted-Lists](https://wentao-shao.gitbook.io/leetcode/linked-list/21.merge-two-sorted-lists.md)
- [23.Merge-k-Sorted-Lists](https://wentao-shao.gitbook.io/leetcode/linked-list/23.merge-k-sorted-lists.md)
- [234.Palindrome-Linked-List](https://wentao-shao.gitbook.io/leetcode/linked-list/234.palindrome-linked-list.md)
- [237.Delete-Node-in-a-Linked-List](https://wentao-shao.gitbook.io/leetcode/linked-list/237.delete-node-in-a-linked-list.md)
- [24.Swap-Nodes-in-Pairs](https://wentao-shao.gitbook.io/leetcode/linked-list/24.swap-nodes-in-pairs.md)
- [25.Reverse-Nodes-in-k-Group](https://wentao-shao.gitbook.io/leetcode/linked-list/25.reverse-nodes-in-k-group.md)
- [328.Odd-Even-Linked-List](https://wentao-shao.gitbook.io/leetcode/linked-list/328.odd-even-linked-list.md)
- [369.Plus-One-Linked-List](https://wentao-shao.gitbook.io/leetcode/linked-list/369.plus-one-linked-list.md)
- [61.Rotate-List](https://wentao-shao.gitbook.io/leetcode/linked-list/61.rotate-list.md)
- [82.Remove-Duplicates-from-Sorted-List-II](https://wentao-shao.gitbook.io/leetcode/linked-list/82.remove-duplicates-from-sorted-list-ii.md)
- [83.Remove-Duplicates-from-Sorted-List](https://wentao-shao.gitbook.io/leetcode/linked-list/83.remove-duplicates-from-sorted-list.md)
- [86.Partition-List](https://wentao-shao.gitbook.io/leetcode/linked-list/86.partition-list.md)
- [876.Middle-of-the-Linked-List](https://wentao-shao.gitbook.io/leetcode/linked-list/876.middle-of-the-linked-list.md)
- [92.Reverse-Linked-List-II](https://wentao-shao.gitbook.io/leetcode/linked-list/92.reverse-linked-list-ii.md)
- [Remove Duplicates From Unsorted List Geeksforgeeks](https://wentao-shao.gitbook.io/leetcode/linked-list/remove-duplicates-from-unsorted-list-geeksforgeeks.md)
- [Matrix](https://wentao-shao.gitbook.io/leetcode/matrix.md)
- [Spiral Matrix](https://wentao-shao.gitbook.io/leetcode/matrix/spiral-matrix.md)
- [54.Spiral-Matrix](https://wentao-shao.gitbook.io/leetcode/matrix/spiral-matrix/54.spiral-matrix.md)
- [59.Spiral-Matrix-II](https://wentao-shao.gitbook.io/leetcode/matrix/spiral-matrix/59.spiral-matrix-ii.md)
- [1074.Number-of-Submatrices-That-Sum-to-Target](https://wentao-shao.gitbook.io/leetcode/matrix/1074.number-of-submatrices-that-sum-to-target.md)
- [1292.Maximum-Side-Length-of-a-Square-with-Sum-Less-than-or-Equal-to-Threshold](https://wentao-shao.gitbook.io/leetcode/matrix/1292.maximum-side-length-of-a-square-with-sum-less-than-or-equal-to-threshold.md)
- [240.Search-a-2D-Matrix-II](https://wentao-shao.gitbook.io/leetcode/matrix/240.search-a-2d-matrix-ii.md)
- [296.Best-Meeting-Point](https://wentao-shao.gitbook.io/leetcode/matrix/296.best-meeting-point.md)
- [304.Range-Sum-Query-2D---Immutable](https://wentao-shao.gitbook.io/leetcode/matrix/304.range-sum-query-2d-immutable.md)
- [311.Sparse-Matrix-Multiplication](https://wentao-shao.gitbook.io/leetcode/matrix/311.sparse-matrix-multiplication.md)
- [36.Valid-Sudoku](https://wentao-shao.gitbook.io/leetcode/matrix/36.valid-sudoku.md)
- [363.Max-Sum-of-Rectangle-No-Larger-Than-K](https://wentao-shao.gitbook.io/leetcode/matrix/363.max-sum-of-rectangle-no-larger-than-k.md)
- [37.Sudoku-Solver](https://wentao-shao.gitbook.io/leetcode/matrix/37.sudoku-solver.md)
- [48.Rotate-Image](https://wentao-shao.gitbook.io/leetcode/matrix/48.rotate-image.md)
- [498.Diagonal-Traverse](https://wentao-shao.gitbook.io/leetcode/matrix/498.diagonal-traverse.md)
- [562.Longest-Line-of-Consecutive-One-in-Matrix](https://wentao-shao.gitbook.io/leetcode/matrix/562.longest-line-of-consecutive-one-in-matrix.md)
- [723.Candy-Crush](https://wentao-shao.gitbook.io/leetcode/matrix/723.candy-crush.md)
- [73.Set-Matrix-Zeroes](https://wentao-shao.gitbook.io/leetcode/matrix/73.set-matrix-zeroes.md)
- [835.Image-Overlap](https://wentao-shao.gitbook.io/leetcode/matrix/835.image-overlap.md)
- [939.Minimum-Area-Rectangle](https://wentao-shao.gitbook.io/leetcode/matrix/939.minimum-area-rectangle.md)
- [963.Minimum-Area-Rectangle-II](https://wentao-shao.gitbook.io/leetcode/matrix/963.minimum-area-rectangle-ii.md)
- [986.Interval-List-Intersections](https://wentao-shao.gitbook.io/leetcode/matrix/986.interval-list-intersections.md)
- [Friend Circles](https://wentao-shao.gitbook.io/leetcode/matrix/friend-circles.md)
- [Mergesort](https://wentao-shao.gitbook.io/leetcode/mergesort.md)
- [Algorithm Swap](https://wentao-shao.gitbook.io/leetcode/mergesort/algorithm-swap.md)
- [Numbers](https://wentao-shao.gitbook.io/leetcode/numbers.md)
- [1088.Confusing-Number-II](https://wentao-shao.gitbook.io/leetcode/numbers/1088.confusing-number-ii.md)
- [13.Roman-to-Integer](https://wentao-shao.gitbook.io/leetcode/numbers/13.roman-to-integer.md)
- [166.Fraction-to-Recurring-Decimal](https://wentao-shao.gitbook.io/leetcode/numbers/166.fraction-to-recurring-decimal.md)
- [202.Happy-Number](https://wentao-shao.gitbook.io/leetcode/numbers/202.happy-number.md)
- [65.Valid-Number](https://wentao-shao.gitbook.io/leetcode/numbers/65.valid-number.md)
- [681.Next-Closest-Time](https://wentao-shao.gitbook.io/leetcode/numbers/681.next-closest-time.md)
- [780.Reaching-Points](https://wentao-shao.gitbook.io/leetcode/numbers/780.reaching-points.md)
- [829.Consecutive-Numbers-Sum](https://wentao-shao.gitbook.io/leetcode/numbers/829.consecutive-numbers-sum.md)
- [914.X-of-a-Kind-in-a-Deck-of-Cards](https://wentao-shao.gitbook.io/leetcode/numbers/914.x-of-a-kind-in-a-deck-of-cards.md)
- [991.Broken-Calculator](https://wentao-shao.gitbook.io/leetcode/numbers/991.broken-calculator.md)
- [Other](https://wentao-shao.gitbook.io/leetcode/other.md)
- [1185.Day-of-the-Week](https://wentao-shao.gitbook.io/leetcode/other/1185.day-of-the-week.md)
- [149.Max-Points-on-a-Line](https://wentao-shao.gitbook.io/leetcode/other/149.max-points-on-a-line.md)
- [176.Second-Highest-Salary](https://wentao-shao.gitbook.io/leetcode/other/176.second-highest-salary.md)
- [20.Valid-Parentheses](https://wentao-shao.gitbook.io/leetcode/other/20.valid-parentheses.md)
- [277.Find-the-Celebrity](https://wentao-shao.gitbook.io/leetcode/other/277.find-the-celebrity.md)
- [612.Shortest-Distance-in-a-Plane](https://wentao-shao.gitbook.io/leetcode/other/612.shortest-distance-in-a-plane.md)
- [\[8.String-to-Integer-(atoi)\](Other/8.String-to-Integer-(atoi).md)](https://wentao-shao.gitbook.io/leetcode/other/8.string-to-integer-atoi-other-8.string-to-integer-atoi--md.md)
- [Permutation And Combination](https://wentao-shao.gitbook.io/leetcode/permutation-and-combination.md)
- [46.Permutations](https://wentao-shao.gitbook.io/leetcode/permutation-and-combination/46.permutations.md)
- [47.Permutations-II](https://wentao-shao.gitbook.io/leetcode/permutation-and-combination/47.permutations-ii.md)
- [60.Permutation-Sequence](https://wentao-shao.gitbook.io/leetcode/permutation-and-combination/60.permutation-sequence.md)
- [77.Combinations](https://wentao-shao.gitbook.io/leetcode/permutation-and-combination/77.combinations.md)
- [78.Subsets](https://wentao-shao.gitbook.io/leetcode/permutation-and-combination/78.subsets.md)
- [90.Subsets-II](https://wentao-shao.gitbook.io/leetcode/permutation-and-combination/90.subsets-ii.md)
- [Queue](https://wentao-shao.gitbook.io/leetcode/queue.md)
- [480.Sliding-Window-Median](https://wentao-shao.gitbook.io/leetcode/queue/480.sliding-window-median.md)
- [853.Car-Fleet](https://wentao-shao.gitbook.io/leetcode/queue/853.car-fleet.md)
- [862.Shortest-Subarray-with-Sum-at-Least-K](https://wentao-shao.gitbook.io/leetcode/queue/862.shortest-subarray-with-sum-at-least-k.md)
- [950.Reveal-Cards-In-Increasing-Order](https://wentao-shao.gitbook.io/leetcode/queue/950.reveal-cards-in-increasing-order.md)
- [Sort Algorithm](https://wentao-shao.gitbook.io/leetcode/sort-algorithm.md)
- [1057.Campus-Bikes](https://wentao-shao.gitbook.io/leetcode/sort-algorithm/1057.campus-bikes.md)
- [969.Pancake-Sorting](https://wentao-shao.gitbook.io/leetcode/sort-algorithm/969.pancake-sorting.md)
- [Bubble Sort](https://wentao-shao.gitbook.io/leetcode/sort-algorithm/bubble-sort.md)
- [Merge Sort](https://wentao-shao.gitbook.io/leetcode/sort-algorithm/merge-sort.md)
- [Quick Sort](https://wentao-shao.gitbook.io/leetcode/sort-algorithm/quick-sort.md)
- [Stack](https://wentao-shao.gitbook.io/leetcode/stack.md)
- [1130.Minimum-Cost-Tree-From-Leaf-Values](https://wentao-shao.gitbook.io/leetcode/stack/1130.minimum-cost-tree-from-leaf-values.md)
- [1249.Minimum-Remove-to-Make-Valid-Parentheses](https://wentao-shao.gitbook.io/leetcode/stack/1249.minimum-remove-to-make-valid-parentheses.md)
- [379.Design-Phone-Directory](https://wentao-shao.gitbook.io/leetcode/stack/379.design-phone-directory.md)
- [394.Decode-String](https://wentao-shao.gitbook.io/leetcode/stack/394.decode-string.md)
- [402.Remove-K-Digits](https://wentao-shao.gitbook.io/leetcode/stack/402.remove-k-digits.md)
- [456.132-Pattern](https://wentao-shao.gitbook.io/leetcode/stack/456.132-pattern.md)
- [496.Next-Greater-Element-I](https://wentao-shao.gitbook.io/leetcode/stack/496.next-greater-element-i.md)
- [503.Next-Greater-Element-II](https://wentao-shao.gitbook.io/leetcode/stack/503.next-greater-element-ii.md)
- [636.Exclusive-Time-of-Functions](https://wentao-shao.gitbook.io/leetcode/stack/636.exclusive-time-of-functions.md)
- [71.Simplify-Path](https://wentao-shao.gitbook.io/leetcode/stack/71.simplify-path.md)
- [739.Daily-Temperatures](https://wentao-shao.gitbook.io/leetcode/stack/739.daily-temperatures.md)
- [844.Backspace-String-Compare](https://wentao-shao.gitbook.io/leetcode/stack/844.backspace-string-compare.md)
- [917.Reverse-Only-Letters](https://wentao-shao.gitbook.io/leetcode/stack/917.reverse-only-letters.md)
- [946.Validate-Stack-Sequences](https://wentao-shao.gitbook.io/leetcode/stack/946.validate-stack-sequences.md)
- [String](https://wentao-shao.gitbook.io/leetcode/string.md)
- [1055.Shortest-Way-to-Form-String](https://wentao-shao.gitbook.io/leetcode/string/1055.shortest-way-to-form-string.md)
- [1096.Brace-Expansion-II](https://wentao-shao.gitbook.io/leetcode/string/1096.brace-expansion-ii.md)
- [1100.Find-K-Length-Substrings-With-No-Repeated-Characters](https://wentao-shao.gitbook.io/leetcode/string/1100.find-k-length-substrings-with-no-repeated-characters.md)
- [1153.String-Transforms-Into-Another-String](https://wentao-shao.gitbook.io/leetcode/string/1153.string-transforms-into-another-string.md)
- [12.Integer-to-Roman](https://wentao-shao.gitbook.io/leetcode/string/12.integer-to-roman.md)
- [125.Valid-Palindrome](https://wentao-shao.gitbook.io/leetcode/string/125.valid-palindrome.md)
- [151.Reverse-Words-in-a-String](https://wentao-shao.gitbook.io/leetcode/string/151.reverse-words-in-a-string.md)
- [161.One-Edit-Distance](https://wentao-shao.gitbook.io/leetcode/string/161.one-edit-distance.md)
- [165.Compare-Version-Numbers](https://wentao-shao.gitbook.io/leetcode/string/165.compare-version-numbers.md)
- [168.Excel-Sheet-Column-Title](https://wentao-shao.gitbook.io/leetcode/string/168.excel-sheet-column-title.md)
- [171.Excel-Sheet-Column-Number](https://wentao-shao.gitbook.io/leetcode/string/171.excel-sheet-column-number.md)
- [205.Isomorphic-Strings](https://wentao-shao.gitbook.io/leetcode/string/205.isomorphic-strings.md)
- [214.Shortest-Palindrome](https://wentao-shao.gitbook.io/leetcode/string/214.shortest-palindrome.md)
- [242.Valid-Anagram](https://wentao-shao.gitbook.io/leetcode/string/242.valid-anagram.md)
- [3.Longest-Substring-Without-Repeating-Characters](https://wentao-shao.gitbook.io/leetcode/string/3.longest-substring-without-repeating-characters.md)
- [344.Reverse-String](https://wentao-shao.gitbook.io/leetcode/string/344.reverse-string.md)
- [415.Add-Strings](https://wentao-shao.gitbook.io/leetcode/string/415.add-strings.md)
- [43.Multiply-Strings](https://wentao-shao.gitbook.io/leetcode/string/43.multiply-strings.md)
- [443.String-Compression](https://wentao-shao.gitbook.io/leetcode/string/443.string-compression.md)
- [459.Repeated-Substring-Pattern](https://wentao-shao.gitbook.io/leetcode/string/459.repeated-substring-pattern.md)
- [482.License-Key-Formatting](https://wentao-shao.gitbook.io/leetcode/string/482.license-key-formatting.md)
- [5.Longest-Palindromic-Substring](https://wentao-shao.gitbook.io/leetcode/string/5.longest-palindromic-substring.md)
- [556.Next-Greater-Element-III](https://wentao-shao.gitbook.io/leetcode/string/556.next-greater-element-iii.md)
- [557.Reverse-Words-in-a-String-III](https://wentao-shao.gitbook.io/leetcode/string/557.reverse-words-in-a-string-iii.md)
- [567.Permutation-in-String](https://wentao-shao.gitbook.io/leetcode/string/567.permutation-in-string.md)
- [640.Solve-the-Equation](https://wentao-shao.gitbook.io/leetcode/string/640.solve-the-equation.md)
- [68.Text-Justification](https://wentao-shao.gitbook.io/leetcode/string/68.text-justification.md)
- [726.Number-of-Atoms](https://wentao-shao.gitbook.io/leetcode/string/726.number-of-atoms.md)
- [736.Parse-Lisp-Expression](https://wentao-shao.gitbook.io/leetcode/string/736.parse-lisp-expression.md)
- [767.Reorganize-String](https://wentao-shao.gitbook.io/leetcode/string/767.reorganize-string.md)
- [784.Letter-Case-Permutation](https://wentao-shao.gitbook.io/leetcode/string/784.letter-case-permutation.md)
- [792.Number-of-Matching-Subsequences](https://wentao-shao.gitbook.io/leetcode/string/792.number-of-matching-subsequences.md)
- [809.Expressive-Words](https://wentao-shao.gitbook.io/leetcode/string/809.expressive-words.md)
- [819.Most-Common-Word](https://wentao-shao.gitbook.io/leetcode/string/819.most-common-word.md)
- [833.Find-And-Replace-in-String](https://wentao-shao.gitbook.io/leetcode/string/833.find-and-replace-in-string.md)
- [Toposort](https://wentao-shao.gitbook.io/leetcode/toposort.md)
- [1136.Parallel-Courses](https://wentao-shao.gitbook.io/leetcode/toposort/1136.parallel-courses.md)
- [207.Course-Schedule](https://wentao-shao.gitbook.io/leetcode/toposort/207.course-schedule.md)
- [210.Course-Schedule-II](https://wentao-shao.gitbook.io/leetcode/toposort/210.course-schedule-ii.md)
- [269.Alien-Dictionary](https://wentao-shao.gitbook.io/leetcode/toposort/269.alien-dictionary.md)
- [444.Sequence-Reconstruction](https://wentao-shao.gitbook.io/leetcode/toposort/444.sequence-reconstruction.md)
- [468.Validate-IP-Address](https://wentao-shao.gitbook.io/leetcode/toposort/468.validate-ip-address.md)
- [Topological Sorting](https://wentao-shao.gitbook.io/leetcode/toposort/topological-sorting.md)
- [Trie Tree](https://wentao-shao.gitbook.io/leetcode/trie-tree.md)
- [1032.Stream-of-Characters](https://wentao-shao.gitbook.io/leetcode/trie-tree/1032.stream-of-characters.md)
- [1268.Search-Suggestions-System](https://wentao-shao.gitbook.io/leetcode/trie-tree/1268.search-suggestions-system.md)
- [\[208.Implement-Trie-(Prefix-Tree)\](Trie-Tree/208.Implement-Trie-(Prefix-Tree).md)](https://wentao-shao.gitbook.io/leetcode/trie-tree/208.implement-trie-prefix-tree-trie-tree-208.implement-trie-prefix-tree--md.md)
- [336.Palindrome-Pairs](https://wentao-shao.gitbook.io/leetcode/trie-tree/336.palindrome-pairs.md)
- [Two Pointers](https://wentao-shao.gitbook.io/leetcode/two-pointers.md)
- [1004.Max-Consecutive-Ones-III](https://wentao-shao.gitbook.io/leetcode/two-pointers/1004.max-consecutive-ones-iii.md)
- [1099.Two-Sum-Less-Than-K](https://wentao-shao.gitbook.io/leetcode/two-pointers/1099.two-sum-less-than-k.md)
- [159.Longest-Substring-with-At-Most-Two-Distinct-Characters](https://wentao-shao.gitbook.io/leetcode/two-pointers/159.longest-substring-with-at-most-two-distinct-characters.md)
- [167.Two-Sum-II---Input-array-is-sorted](https://wentao-shao.gitbook.io/leetcode/two-pointers/167.two-sum-ii-input-array-is-sorted.md)
- [26.Remove-Duplicates-from-Sorted-Array](https://wentao-shao.gitbook.io/leetcode/two-pointers/26.remove-duplicates-from-sorted-array.md)
- [27.Remove-Element](https://wentao-shao.gitbook.io/leetcode/two-pointers/27.remove-element.md)
- [340.Longest-Substring-with-At-Most-K-Distinct-Characters](https://wentao-shao.gitbook.io/leetcode/two-pointers/340.longest-substring-with-at-most-k-distinct-characters.md)
- [42.Trapping-Rain-Water](https://wentao-shao.gitbook.io/leetcode/two-pointers/42.trapping-rain-water.md)
- [647.Palindromic-Substrings](https://wentao-shao.gitbook.io/leetcode/two-pointers/647.palindromic-substrings.md)
- [680.Valid-Palindrome-II](https://wentao-shao.gitbook.io/leetcode/two-pointers/680.valid-palindrome-ii.md)
- [75.Sort-Colors](https://wentao-shao.gitbook.io/leetcode/two-pointers/75.sort-colors.md)
- [76.Minimum-Window-Substring](https://wentao-shao.gitbook.io/leetcode/two-pointers/76.minimum-window-substring.md)
- [88.Merge-Sorted-Array](https://wentao-shao.gitbook.io/leetcode/two-pointers/88.merge-sorted-array.md)
- [Sort Colors Ii](https://wentao-shao.gitbook.io/leetcode/two-pointers/sort-colors-ii.md)
- [Union Find](https://wentao-shao.gitbook.io/leetcode/union-find.md)
- [1168.Optimize-Water-Distribution-in-a-Village](https://wentao-shao.gitbook.io/leetcode/union-find/1168.optimize-water-distribution-in-a-village.md)
- [803.Bricks-Falling-When-Hit](https://wentao-shao.gitbook.io/leetcode/union-find/803.bricks-falling-when-hit.md)
- [924.Minimize-Malware-Spread](https://wentao-shao.gitbook.io/leetcode/union-find/924.minimize-malware-spread.md)
- [947.Most-Stones-Removed-with-Same-Row-or-Column](https://wentao-shao.gitbook.io/leetcode/union-find/947.most-stones-removed-with-same-row-or-column.md)