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Title: GitHub - rsyanting/leetcode: Leetcode 题解 / 刷题笔记。主要在 中国站 做题。非完全原创，参考了大量其他优秀题解。

Open Graph Title: GitHub - rsyanting/leetcode: Leetcode 题解 / 刷题笔记。主要在 中国站 做题。非完全原创，参考了大量其他优秀题解。

X Title: GitHub - rsyanting/leetcode: Leetcode 题解 / 刷题笔记。主要在 中国站 做题。非完全原创，参考了大量其他优秀题解。

Description: Leetcode 题解 / 刷题笔记。主要在 中国站 做题。非完全原创，参考了大量其他优秀题解。. Contribute to rsyanting/leetcode development by creating an account on GitHub.

Open Graph Description: Leetcode 题解 / 刷题笔记。主要在 中国站 做题。非完全原创，参考了大量其他优秀题解。. Contribute to rsyanting/leetcode development by creating an account on GitHub.

X Description: Leetcode 题解 / 刷题笔记。主要在 中国站 做题。非完全原创，参考了大量其他优秀题解。. Contribute to rsyanting/leetcode development by creating an account on GitHub.

Opengraph URL: https://github.com/rsyanting/leetcode

X: @github

direct link

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og:image:altLeetcode 题解 / 刷题笔记。主要在 中国站 做题。非完全原创，参考了大量其他优秀题解。. Contribute to rsyanting/leetcode development by creating an account on GitHub.
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Array 数组https://leetcode-cn.com/tag/array/
https://patch-diff.githubusercontent.com/rsyanting/leetcode#array-数组
15 . 三数之和https://leetcode-cn.com/problems/3sum/
15 . 三数之和https://github.com/dingjianhub/leetcode/blob/master/Notes/Array%20%E6%95%B0%E7%BB%84/15_ThreeSums_%E4%B8%89%E6%95%B0%E4%B9%8B%E5%92%8C.md
16 . 最接近的三数之和https://leetcode-cn.com/problems/3sum-closest/
16 . 最接近的三数之和https://github.com/dingjianhub/leetcode/blob/master/Notes/Array%20%E6%95%B0%E7%BB%84/16_ThreeSumsClosest_%E6%9C%80%E6%8E%A5%E8%BF%91%E7%9A%84%E4%B8%89%E6%95%B0%E4%B9%8B%E5%92%8C.md
54 . 螺旋矩阵https://leetcode-cn.com/problems/spiral-matrix/
54 . 螺旋矩阵https://github.com/dingjianhub/leetcode/blob/master/Notes/Array%20%E6%95%B0%E7%BB%84/54_SpiralMatrix_%E8%9E%BA%E6%97%8B%E7%9F%A9%E9%98%B5.md
54 . 螺旋矩阵 2https://leetcode-cn.com/problems/spiral-matrix-ii/
54 . 螺旋矩阵 2https://github.com/dingjianhub/leetcode/blob/master/Notes/Array%20%E6%95%B0%E7%BB%84/54_SpiralMatrixii_%E8%9E%BA%E6%97%8B%E7%9F%A9%E9%98%B52.md
238 . 除自身以外的数组的乘积https://leetcode-cn.com/problems/product-of-array-except-self/
238 . 除自身以外的数组的乘积https://github.com/dingjianhub/leetcode/blob/master/Notes/Array%20%E6%95%B0%E7%BB%84/238_ProductOfArrayExceptSelf_%E9%99%A4%E8%87%AA%E8%BA%AB%E4%BB%A5%E5%A4%96%E7%9A%84%E6%95%B0%E7%BB%84%E7%9A%84%E4%B9%98%E7%A7%AF.md
628 . 三个数的最大乘积https://leetcode-cn.com/problems/maximum-product-of-three-numbers/
628 . 三个数的最大乘积https://github.com/dingjianhub/leetcode/blob/master/Notes/Array%20%E6%95%B0%E7%BB%84/628_MaximumProductOfThreeNumbers_%E4%B8%89%E4%B8%AA%E6%95%B0%E7%9A%84%E6%9C%80%E5%A4%A7%E4%B9%98%E7%A7%AF.md
String 字符串https://leetcode-cn.com/tag/string/
https://patch-diff.githubusercontent.com/rsyanting/leetcode#string-字符串
125 . 验证回文串https://leetcode-cn.com/problems/valid-palindrome/
125 . 验证回文串https://github.com/dingjianhub/leetcode/blob/master/Notes/String%20%E5%AD%97%E7%AC%A6%E4%B8%B2/125_ValidPalindrome_%E9%AA%8C%E8%AF%81%E5%9B%9E%E6%96%87%E4%B8%B2.md
383 . 赎金信https://leetcode-cn.com/problems/ransom-note/
383 . 赎金信https://github.com/dingjianhub/leetcode/blob/master/Notes/String%20%E5%AD%97%E7%AC%A6%E4%B8%B2/383_RansomNotes_%E8%B5%8E%E9%87%91%E4%BF%A1.md
387 . 字符串中的第一个唯一字符https://leetcode-cn.com/problems/first-unique-character-in-a-string/
387 . 字符串中的第一个唯一字符https://github.com/dingjianhub/leetcode/blob/master/Notes/String%20%E5%AD%97%E7%AC%A6%E4%B8%B2/387_FirstUniqueCharacterInAString_%E5%AD%97%E7%AC%A6%E4%B8%B2%E4%B8%AD%E7%9A%84%E7%AC%AC%E4%B8%80%E4%B8%AA%E5%94%AF%E4%B8%80%E5%AD%97%E7%AC%A6.md
680 . 验证回文字符串2https://leetcode-cn.com/problems/valid-palindrome-ii/
680 . 验证回文字符串2https://github.com/dingjianhub/leetcode/blob/master/Notes/String%20%E5%AD%97%E7%AC%A6%E4%B8%B2/680_ValidPalindrome-ii_%E9%AA%8C%E8%AF%81%E5%9B%9E%E6%96%87%E5%AD%97%E7%AC%A6%E4%B8%B22.md
Two Pointers 双指针https://leetcode-cn.com/tag/two-pointers/
https://patch-diff.githubusercontent.com/rsyanting/leetcode#two-pointers-双指针
88 . 合并两个有序数组https://leetcode-cn.com/problems/merge-sorted-array/
88 . 合并两个有序数组https://github.com/dingjianhub/leetcode/blob/master/Notes/Two%20Pointers%20%E5%8F%8C%E6%8C%87%E9%92%88/88_MergeSortedArray_%E5%90%88%E5%B9%B6%E4%B8%A4%E4%B8%AA%E6%9C%89%E5%BA%8F%E6%95%B0%E7%BB%84.md
986 . 区间列表的交集https://leetcode-cn.com/problems/interval-list-intersections/
986 . 区间列表的交集https://github.com/dingjianhub/leetcode/blob/master/Notes/Two%20Pointers%20%E5%8F%8C%E6%8C%87%E9%92%88/986_IntervalListIntersections_%E5%8C%BA%E9%97%B4%E5%88%97%E8%A1%A8%E7%9A%84%E4%BA%A4%E9%9B%86.md
713 . 乘积小于K的子数组https://leetcode-cn.com/problems/subarray-product-less-than-k/
713 . 乘积小于K的子数组https://github.com/dingjianhub/leetcode/blob/master/Notes/Two%20Pointers%20%E5%8F%8C%E6%8C%87%E9%92%88/713_SubarrayProductLessThanK_%E4%B9%98%E7%A7%AF%E5%B0%8F%E4%BA%8EK%E7%9A%84%E5%AD%90%E6%95%B0%E7%BB%84.md
Tree 树https://leetcode-cn.com/tag/tree/
https://patch-diff.githubusercontent.com/rsyanting/leetcode#tree-树
144 . 二叉树的前序遍历https://leetcode-cn.com/problems/binary-tree-preorder-traversal/
144 . 二叉树的前序遍历https://github.com/dingjianhub/leetcode/blob/master/Notes/tree%20%E6%A0%91/144_BinaryTreePreorderTraversal_%E4%BA%8C%E5%8F%89%E6%A0%91%E7%9A%84%E5%89%8D%E5%BA%8F%E9%81%8D%E5%8E%86.md
94 . 二叉树的中序遍历https://leetcode-cn.com/problems/binary-tree-inorder-traversal/
94 . 二叉树的中序遍历https://github.com/dingjianhub/leetcode/blob/master/Notes/tree%20%E6%A0%91/94_BinaryTreeInorderTraversal_%E4%BA%8C%E5%8F%89%E6%A0%91%E7%9A%84%E4%B8%AD%E5%BA%8F%E9%81%8D%E5%8E%86.md
145 . 二叉树的后序遍历https://leetcode-cn.com/problems/binary-tree-postorder-traversal/
145 . 二叉树的后序遍历https://github.com/dingjianhub/leetcode/blob/master/Notes/tree%20%E6%A0%91/145_BinaryTreePostorderTraversal_%E4%BA%8C%E5%8F%89%E6%A0%91%E7%9A%84%E5%90%8E%E5%BA%8F%E9%81%8D%E5%8E%86.md
102 . 二叉树的层序遍历https://leetcode-cn.com/problems/binary-tree-level-order-traversal/
102 . 二叉树的层序遍历https://github.com/dingjianhub/leetcode/blob/master/Notes/tree%20%E6%A0%91/102_BinaryTreeLevelOrderTraversal_%E4%BA%8C%E5%8F%89%E6%A0%91%E7%9A%84%E5%B1%82%E5%BA%8F%E9%81%8D%E5%8E%86.md
563 . 二叉树的坡度https://leetcode-cn.com/problems/binary-tree-tilt/
563 . 二叉树的坡度https://github.com/dingjianhub/leetcode/blob/master/Notes/tree%20%E6%A0%91/563_BinaryTreeTilt_%E4%BA%8C%E5%8F%89%E6%A0%91%E7%9A%84%E5%9D%A1%E5%BA%A6.md
98 . 验证搜索二叉树https://leetcode-cn.com/problems/validate-binary-search-tree/
98 . 验证搜索二叉树https://github.com/dingjianhub/leetcode/blob/master/Notes/tree%20%E6%A0%91/98_ValidateBinarySearchTree_%E9%AA%8C%E8%AF%81%E6%90%9C%E7%B4%A2%E4%BA%8C%E5%8F%89%E6%A0%91.md
105 . 从前序与中序遍历序列构造二叉树https://leetcode-cn.com/problems/construct-binary-tree-from-preorder-and-inorder-traversal/
105 . 从前序与中序遍历序列构造二叉树https://github.com/dingjianhub/leetcode/blob/master/Notes/tree%20%E6%A0%91/105_ConstructBinaryTreeFromPreorderAndInorderTraversal_%E4%BB%8E%E5%89%8D%E5%BA%8F%E4%B8%8E%E4%B8%AD%E5%BA%8F%E9%81%8D%E5%8E%86%E5%BA%8F%E5%88%97%E6%9E%84%E9%80%A0%E4%BA%8C%E5%8F%89%E6%A0%91.md
106 . 从中序和后序遍历构造二叉树https://leetcode-cn.com/problems/construct-binary-tree-from-inorder-and-postorder-traversal/
106 . 从中序和后序遍历构造二叉树https://github.com/dingjianhub/leetcode/blob/master/Notes/tree%20%E6%A0%91/106_ConstructBinaryTreeFromInorderAndPostorderTraversal_%E4%BB%8E%E4%B8%AD%E5%BA%8F%E5%92%8C%E5%90%8E%E5%BA%8F%E9%81%8D%E5%8E%86%E6%9E%84%E9%80%A0%E4%BA%8C%E5%8F%89%E6%A0%91.md
1008 . 先序遍历二叉搜索树构造二叉树https://leetcode-cn.com/problems/construct-binary-search-tree-from-preorder-traversal/
1008 . 先序遍历二叉搜索树构造二叉树https://github.com/dingjianhub/leetcode/blob/master/Notes/tree%20%E6%A0%91/1008_ConstructBinarySearchTreeFromPreorderTraversal_%E5%85%88%E5%BA%8F%E9%81%8D%E5%8E%86%E4%BA%8C%E5%8F%89%E6%90%9C%E7%B4%A2%E6%A0%91%E6%9E%84%E9%80%A0%E4%BA%8C%E5%8F%89%E6%A0%91.md
101 . 对称二叉树https://leetcode-cn.com/problems/symmetric-tree/
101 . 对称二叉树https://github.com/dingjianhub/leetcode/blob/master/Notes/tree%20%E6%A0%91/101_SymmetricTree_%E5%AF%B9%E7%A7%B0%E4%BA%8C%E5%8F%89%E6%A0%91.md
104 . 二叉树的最大深度https://leetcode-cn.com/problems/maximum-depth-of-binary-tree/
104 . 二叉树的最大深度https://github.com/dingjianhub/leetcode/blob/master/Notes/tree%20%E6%A0%91/104_MaximumDepthOfBinaryTree_%E4%BA%8C%E5%8F%89%E6%A0%91%E7%9A%84%E6%9C%80%E5%A4%A7%E6%B7%B1%E5%BA%A6.md
112 . 路径总和https://leetcode-cn.com/problems/path-sum/
112 . 路径总和https://github.com/dingjianhub/leetcode/blob/master/Notes/tree%20%E6%A0%91/112_PathSum_%E8%B7%AF%E5%BE%84%E6%80%BB%E5%92%8C.md
226 . 翻转二叉树https://leetcode-cn.com/problems/invert-binary-tree/
226 . 翻转二叉树https://github.com/dingjianhub/leetcode/blob/master/Notes/tree%20%E6%A0%91/226_InvertBinaryTree_%E7%BF%BB%E8%BD%AC%E4%BA%8C%E5%8F%89%E6%A0%91.md
Dynamic Programming 动态规划https://leetcode-cn.com/tag/dynamic-programming/
https://patch-diff.githubusercontent.com/rsyanting/leetcode#dynamic-programming-动态规划
53 . 最大子序和https://leetcode-cn.com/problems/maximum-subarray/
53 . 最大子序和https://github.com/dingjianhub/leetcode/blob/master/Notes/Dynamic%20Programming%20%E5%8A%A8%E6%80%81%E8%A7%84%E5%88%92/53_MaximumSubarray_%E6%9C%80%E5%A4%A7%E5%AD%90%E5%BA%8F%E5%92%8C.md
152 . 乘积最大子数组https://leetcode-cn.com/problems/maximum-product-subarray/
152 . 乘积最大子数组https://github.com/dingjianhub/leetcode/blob/master/Notes/Dynamic%20Programming%20%E5%8A%A8%E6%80%81%E8%A7%84%E5%88%92/152_MaximumProductSubarray_%E4%B9%98%E7%A7%AF%E6%9C%80%E5%A4%A7%E5%AD%90%E6%95%B0%E7%BB%84.md
Graph 图https://leetcode-cn.com/tag/graph/
https://patch-diff.githubusercontent.com/rsyanting/leetcode#graph-图
997 . 找到小镇的法官https://leetcode-cn.com/problems/find-the-town-judge/
997 . 找到小镇的法官https://github.com/dingjianhub/leetcode/blob/master/Notes/Graph%20%E5%9B%BE/997_FindTheTownJudge_%E6%89%BE%E5%88%B0%E5%B0%8F%E9%95%87%E7%9A%84%E6%B3%95%E5%AE%98.md
HashMap 哈希表https://leetcode-cn.com/tag/hash-table/
https://patch-diff.githubusercontent.com/rsyanting/leetcode#hashmap-哈希表
347 . 前 K 高频元素https://leetcode.com/problems/top-k-frequent-elements/
347 . 前 K 高频元素https://github.com/dingjianhub/leetcode/blob/master/Notes/HashMap%20%E5%93%88%E5%B8%8C%E8%A1%A8/347_TopKFrequentElements_%E5%89%8D%20K%20%E4%B8%AA%E9%AB%98%E9%A2%91%E5%85%83%E7%B4%A0.md
451 . 根据字符出现的频率排序https://leetcode-cn.com/problems/sort-characters-by-frequency/
451 . 根据字符出现的频率排序https://github.com/dingjianhub/leetcode/blob/master/Notes/HashMap%20%E5%93%88%E5%B8%8C%E8%A1%A8/451_SortCharactersByFrequency_%E6%A0%B9%E6%8D%AE%E5%AD%97%E7%AC%A6%E5%87%BA%E7%8E%B0%E7%9A%84%E9%A2%91%E7%8E%87%E6%8E%92%E5%BA%8F.md
Math 数学https://leetcode-cn.com/tag/math/
https://patch-diff.githubusercontent.com/rsyanting/leetcode#math-数学
Greedy 贪心https://leetcode-cn.com/tag/greedy/
https://patch-diff.githubusercontent.com/rsyanting/leetcode#greedy-贪心
1029 . 两地调度之优化算法https://leetcode-cn.com/problems/two-city-scheduling/
1029 . 两地调度之优化算法https://github.com/dingjianhub/leetcode/blob/master/Notes/Greedy%20%E8%B4%AA%E5%BF%83/1029_TwoCityScheduling_%E4%B8%A4%E5%9C%B0%E8%B0%83%E5%BA%A6%E4%B9%8B%E4%BC%98%E5%8C%96%E7%AE%97%E6%B3%95.md
Bit Manipulation 位操作https://leetcode.com/tag/bit-manipulation/
https://patch-diff.githubusercontent.com/rsyanting/leetcode#bit-manipulation-位操作
476 . 数字的补数https://leetcode-cn.com/problems/number-complement/
476 . 数字的补数https://github.com/dingjianhub/leetcode/blob/master/Notes/Bit%20Manipulation%20%E4%BD%8D%E6%93%8D%E4%BD%9C/476_NumberComplement_%E6%95%B0%E5%AD%97%E7%9A%84%E8%A1%A5%E6%95%B0.md
191 . 位1的个数https://leetcode-cn.com/problems/number-of-1-bits/
191 . 位1的个数https://github.com/dingjianhub/leetcode/blob/master/Notes/Bit%20Manipulation%20%E4%BD%8D%E6%93%8D%E4%BD%9C/191_NumberOf1Bits_%E4%BD%8D1%E7%9A%84%E4%B8%AA%E6%95%B0.md
231 . 2的幂https://leetcode-cn.com/problems/power-of-two/
231 . 2的幂https://github.com/dingjianhub/leetcode/blob/master/Notes/Bit%20Manipulation%20%E4%BD%8D%E6%93%8D%E4%BD%9C/231_PowerOfTwo_2%E7%9A%84%E5%B9%82.md
461 . 汉明距离https://leetcode-cn.com/problems/hamming-distance/
461 . 汉明距离https://github.com/dingjianhub/leetcode/blob/master/Notes/Bit%20Manipulation%20%E4%BD%8D%E6%93%8D%E4%BD%9C/461_HammingDistance_%E6%B1%89%E6%98%8E%E8%B7%9D%E7%A6%BB.md
477 . 汉明距离总和https://leetcode-cn.com/problems/total-hamming-distance/
477 . 汉明距离总和https://github.com/dingjianhub/leetcode/blob/master/Notes/Bit%20Manipulation%20%E4%BD%8D%E6%93%8D%E4%BD%9C/477_TotalHammingDistance_%E6%B1%89%E6%98%8E%E8%B7%9D%E7%A6%BB%E6%80%BB%E5%92%8C.md
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