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LeetCode-Python

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LeetCode Python 练习

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# LeetCode 习题记录

> 解题语言：Python3

## 探索

### 面试

#### 初级算法

##### 数组

- [从排序数组中删除重复项](./Interview/Easy%20Collection/Array/question_1.py)
- [买卖股票的最佳时机 II](./Interview/Easy%20Collection/Array/question_2.py)
- [旋转数组](./Interview/Easy%20Collection/Array/question_3.py)
- [存在重复](./Interview/Easy%20Collection/Array/question_4.py)
- [只出现一次的数字](./Interview/Easy%20Collection/Array/question_5.py)
- [两个数组的交集 II](./Interview/Easy%20Collection/Array/question_6.py)
- [加一](./Interview/Easy%20Collection/Array/question_7.py)
- [移动零](./Interview/Easy%20Collection/Array/question_8.py)
- [两数之和](./Interview/Easy%20Collection/Array/question_9.py)
- [有效的数独](./Interview/Easy%20Collection/Array/question_10.py)
- [旋转图像](./Interview/Easy%20Collection/Array/question_11.py)

##### 字符串

- [反转字符串](./Interview/Easy%20Collection/Strings/question_1.py)
- [颠倒整数](./Interview/Easy%20Collection/Strings/question_2.py)
- [字符串中的第一个唯一字符](./Interview/Easy%20Collection/Strings/question_3.py)
- [有效的字母异位词](./Interview/Easy%20Collection/Strings/question_4.py)
- [验证回文字符串](./Interview/Easy%20Collection/Strings/question_5.py)
- [字符串转整数（atoi）](./Interview/Easy%20Collection/Strings/question_6.py)
- [实现strStr()](./Interview/Easy%20Collection/Strings/question_7.py)
- [数数并说](./Interview/Easy%20Collection/Strings/question_8.py)
- [最长公共前缀](./Interview/Easy%20Collection/Strings/question_9.py)

##### 链表

- [删除链表中的节点](./Interview/Easy%20Collection/Linked%20List/question_1.py)
- [删除链表的倒数第N个节点](./Interview/Easy%20Collection/Linked%20List/question_2.py)
- [反转链表](./Interview/Easy%20Collection/Linked%20List/question_3.py)
- [合并两个有序链表](./Interview/Easy%20Collection/Linked%20List/question_4.py)
- [回文链表](./Interview/Easy%20Collection/Linked%20List/question_5.py)
- [环形链表](./Interview/Easy%20Collection/Linked%20List/question_6.py)

##### 树

- [二叉树的最大深度](./Interview/Easy%20Collection/Trees/question_1.py)
- [验证二叉搜索树](./Interview/Easy%20Collection/Trees/question_2.py)
- [对称二叉树](./Interview/Easy%20Collection/Trees/question_3.py)
- [二叉树的层次遍历](./Interview/Easy%20Collection/Trees/question_4.py)
- [将有序数组转换为二叉搜索树](./Interview/Easy%20Collection/Trees/question_5.py)

##### 排序和搜索

- [合并两个有序数组](./Interview/Easy%20Collection/Sorting%20and%20Searching/question_1.py)
- [第一个错误的版本](./Interview/Easy%20Collection/Sorting%20and%20Searching/question_2.py)

##### 动态规划

- [爬楼梯](./Interview/Easy%20Collection/Dynamic%20Programming/question_1.py)
- [买卖股票的最佳时机](./Interview/Easy%20Collection/Dynamic%20Programming/question_2.py)
- [最大子序和](./Interview/Easy%20Collection/Dynamic%20Programming/question_3.py)
- [打家劫舍](./Interview/Easy%20Collection/Dynamic%20Programming/question_4.py)

##### 设计问题

- [打亂數組](./Interview/Easy%20Collection/Design/question_1.py)
- [最小栈](./Interview/Easy%20Collection/Design/question_2.py)

##### 数学

- [Fizz Buzz](./Interview/Easy%20Collection/Math/question_1.py)
- [计数质数](./Interview/Easy%20Collection/Math/question_2.py)
- [3的幂](./Interview/Easy%20Collection/Math/question_3.py)
- [罗马数字转整数](./Interview/Easy%20Collection/Math/question_4.py)

##### 其他

- [位1的个数](./Interview/Easy%20Collection/Others/question_1.py)
- [汉明距离](./Interview/Easy%20Collection/Others/question_2.py)
- [颠倒二进制位](./Interview/Easy%20Collection/Others/question_3.py)
- [杨辉三角](./Interview/Easy%20Collection/Others/question_4.py)
- [有效的括号](./Interview/Easy%20Collection/Others/question_5.py)
- [缺失数字](./Interview/Easy%20Collection/Others/question_6.py)

#### 中级算法

##### 数组和字符串

- [字谜分组](./Interview/Medium%20Collection/Array%20and%20Strings/question_3.py)

##### 链表

- [两数相加](./Interview/Medium%20Collection/Linked%20List/question_1.py)

##### 树和图

- [中序遍历二叉树](./Interview/Medium%20Collection/Trees%20and%20Graphs/question_1.py)

##### 排序和搜索

- [颜色分类](./Interview/Medium%20Collection/Sorting%20and%20Searching/question_1.py)
- [前K个高频元素](./Interview/Medium%20Collection/Sorting%20and%20Searching/question_2.py)
- [数组中的第K个最大元素](./Interview/Medium%20Collection/Sorting%20and%20Searching/question_3.py)
- [寻找峰值](./Interview/Medium%20Collection/Sorting%20and%20Searching/question_4.py)
- [在排序数组中查找元素的第一个和最后一个位置](./Interview/Medium%20Collection/Sorting%20and%20Searching/question_5.py)
- [搜索旋转排序数组](./Interview/Medium%20Collection/Sorting%20and%20Searching/question_7.py)
- [搜索二维矩阵 II](./Interview/Medium%20Collection/Sorting%20and%20Searching/question_8.py)

##### 数学

- [Pow(x, n)](./Interview/Medium%20Collection/Math/question_4.py)
- [x 的平方根](./Interview/Medium%20Collection/Math/question_5.py)

##### 其他

- [两整数之和](./Interview/Medium%20Collection/Others/question_1.py)
- [求众数](./Interview/Medium%20Collection/Others/question_3.py)

#### 高级算法

##### 数组和字符串

- [寻找重复数](./Interview/Hard%20Collection/Array%20and%20Strings/question_8.py)

##### 链表

- [链表排序](./Interview/Hard%20Collection/Linked%20List/question_2.py)

### 学习

#### 数组和字符串

##### 数组简介

- [寻找数组的中心索引](./Learn/Array%20and%20String/Introduction%20to%20Array/question_1.py)
- [至少是其他数字两倍的最大数](./Learn/Array%20and%20String/Introduction%20to%20Array/question_2.py)
- [加一](./Learn/Array%20and%20String/Introduction%20to%20Array/question_3.py)

##### 二维数组简介

- [杨辉三角](./Learn/Array%20and%20String/Introduction%20to%202D%20Array/question_4.py)

##### 字符串简介

- [二进制求和](./Learn/Array%20and%20String/Introduction%20to%20String/question_1.py)
- [实现strStr()](./Learn/Array%20and%20String/Introduction%20to%20String/question_2.py)
- [最长公共前缀](./Learn/Array%20and%20String/Introduction%20to%20String/question_3.py)

##### 双指针技巧

- [反转字符串](./Learn/Array%20and%20String/Two-Pointer%20Technique/question_1.py)
- [数组拆分 I](./Learn/Array%20and%20String/Two-Pointer%20Technique/question_2.py)
- [两数之和 II - 输入有序数组](./Learn/Array%20and%20String/Two-Pointer%20Technique/question_3.py)
- [移除元素](./Learn/Array%20and%20String/Two-Pointer%20Technique/question_4.py)
- [最大连续1的个数](./Learn/Array%20and%20String/Two-Pointer%20Technique/question_5.py)

##### 小结

- [旋转数据](./Learn/Array%20and%20String/Conclusion/question_1.py)
- [杨辉三角 II](./Learn/Array%20and%20String/Conclusion/question_2.py)
- [翻转字符串里的单词](./Learn/Array%20and%20String/Conclusion/question_3.py)
- [反转字符串中的单词 III](./Learn/Array%20and%20String/Conclusion/question_4.py)
- [从排序数组中删除重复项](./Learn/Array%20and%20String/Conclusion/question_5.py)
- [移动零](./Learn/Array%20and%20String/Conclusion/question_6.py)

#### 链表

##### 单链表

- [设计链表](./Learn/Linked%20List/Singly%20Linked%20List/question.py)

##### 双指针技巧

- [环形链表](./Learn/Linked%20List/Two%20Pointer%20Technique/question_1.py)
- [删除链表的倒数第N个节点](./Learn/Linked%20List/Two%20Pointer%20Technique/question_4.py)

##### 经典问题

- [反转链表](./Learn/Linked%20List/Classic%20Problems/question_1.py)
- [回文链表](./Learn/Linked%20List/Classic%20Problems/question_5.py)

##### 小结

- [合并两个有序链表](./Learn/Linked%20List/Conclusion/question_1.py)
- [两数相加](./Learn/Linked%20List/Conclusion/question_2.py)

#### 二叉树

##### 树的遍历

- [二叉树的前序遍历](Learn/Binary%20Tree/Binary%20Tree%20Traversal/question_1.py)
- [中序遍历二叉树](Learn/Binary%20Tree/Binary%20Tree%20Traversal/question_2.py)
- [二叉树的后序遍历](Learn/Binary%20Tree/Binary%20Tree%20Traversal/question_3.py)
- [二叉树的层次遍历](Learn/Binary%20Tree/Binary%20Tree%20Traversal/question_4.py)

##### 运用递归解决问题

- [二叉树的最大深度](Learn/Binary%20Tree/Recursion/question_1.py)
- [对称二叉树](Learn/Binary%20Tree/Recursion/question_2.py)

#### N叉树

##### 遍历

- [N叉树的前序遍历](./Learn/N-ary%20Tree/Traversal/question_1.py)
- [N叉树的后序遍历](./Learn/N-ary%20Tree/Traversal/question_2.py)
- [N叉树的层序遍历](./Learn/N-ary%20Tree/Traversal/question_3.py)

##### 递归

- [N叉树的最大深度](./Learn/N-ary%20Tree/Recursion/question.py)

#### 队列 & 栈

##### 队列：先入先出的数据结构

- [设计循环队列](./Learn/Queue%20&%20Stack/Queue/question_1.py)

##### 栈：后入先出的数据结构

- [最小栈](./Learn/Queue%20&%20Stack/Stack/question_1.py)
- [有效的括号](./Learn/Queue%20&%20Stack/Stack/question_2.py)

##### 栈和深度优先搜索

- [二叉树的中序遍历](./Learn/Queue%20&%20Stack/Stack%20and%20DFS/question_4.py)

##### 小结

- [用栈实现队列](./Learn/Queue%20&%20Stack/Conclusion/question_1.py)
- [用队列实现栈](./Learn/Queue%20&%20Stack/Conclusion/question_2.py)

## 题库

> 编号对应 LeetCode 题号

1 [两数之和](./QuestionBank/1.Two%20Sun/) 
2 [两数相加](./QuestionBank/2.Add%20Two%20Numbers/) 
3 [无重复字符的最长子串](./QuestionBank/3.Longest%20Substring%20Without%20Repeating%20Characters/) 
4 [两个排序数组的中位数](./QuestionBank/4.Median%20of%20Two%20Sorted%20Arrays/) 
5 [最长回文子串](./QuestionBank/5.Longest%20Palindromic%20Substring/) 
6 [Z 字形变换](./QuestionBank/6.leetcode.com/) 
7 [颠倒整数](./QuestionBank/7.Reverse%20Integer/) 
8 [字符串转整数（atoi）](./QuestionBank/8.String%20to%20Integer%20(atoi)/) 
9 [回文数](./QuestionBank/9.Palindrome%20Number/) 
11 [盛最多水的容器](./QuestionBank/11.Container%20With%20Most%20Water/) 
13 [罗马数字转整数](./QuestionBank/13.Roman%20to%20Integer/) 
14 [最长公共前缀](./QuestionBank/14.Longest%20Common%20Prefix/) 
15 [三数之和](./QuestionBank/15.3Sum/) 
19 [删除链表的倒数第N个节点](./QuestionBank/19.Remove%20Nth%20Node%20From%20End%20of%20List/) 
20 [有效的括号](./QuestionBank/20.Valid%20Parentheses/) 
21 [合并两个有序链表](./QuestionBank/21.Merge%20Two%20Sorted%20Lists/) 
22 [括号生成](./QuestionBank/22.Generate%20Parentheses/) 
25 [K 个一组翻转链表](./QuestionBank/25.Reverse%20Nodes%20in%20k-Group/) 
26 [从排序数组中删除重复项](./QuestionBank/26.Remove%20Duplicates%20from%20Sorted%20Array/) 
27 [移除元素](./QuestionBank/27.Remove%20Element/) 
28 [实现strStr](./QuestionBank/28.Implement%20strStr()/) 
29 [两数相除](./QuestionBank/29.Divide%20Two%20Integers/) 
30 [串联所有单词的子串](./QuestionBank/30.Substring%20with%20Concatenation%20of%20All%20Words/) 
33 [搜索旋转排序数组](./QuestionBank/33.Search%20in%20Rotated%20Sorted%20Array/) 
34 [在排序数组中查找元素的第一个和最后一个位置](./QuestionBank/34.Find%20First%20and%20Last%20Position%20of%20Element%20in%20Sorted%20Array/) 
35 [搜索插入位置](./QuestionBank/35.Search%20Insert%20Position/) 
36 [有效的数独](./QuestionBank/36.Valid%20Sudoku/) 
38 [数数并说](./QuestionBank/38.Count%20and%20Say/) 
39 [组合总和](./QuestionBank/39.Combination%20Sum/) 
40 [组合总和 II](./QuestionBank/40.Combination%20Sum%20II/) 
43 [字符串相乘](./QuestionBank/43.Multiply%20Strings/) 
46 [全排列](./QuestionBank/46.Permutations/) 
47 [全排列 II](./QuestionBank/47.Permutations%20II/) 
48 [旋转图像](./QuestionBank/48.Rotate%20Image/) 
49 [字母异位词分组](./QuestionBank/49.Group%20Anagrams/) 
50 [Pow(x, n)](./QuestionBank/50.Pow(x,%20n)/) 
53 [最大子序和](./QuestionBank/53.Maximum%20Subarray/) 
56 [合并区间](./QuestionBank/56.Merge%20Intervals/) 
58 [最后一个单词的长度](./QuestionBank/58.Length%20of%20Last%20Word/) 
61 [旋转链表](./QuestionBank/61.Rotate%20List/) 
66 [加一](./QuestionBank/66.Plus%20One/) 
67 [二进制求和](./QuestionBank/67.Add%20Binary/) 
69 [x 的平方根](./QuestionBank/69.Sqrt(x)/) 
70 [爬楼梯](./QuestionBank/70.Climbing%20Stairs/) 
71 [简化路径](./QuestionBank/71.Simplify%20Path/) 
75 [颜色分类](./QuestionBank/75.Sort%20Colors/) 
77 [组合](./QuestionBank/77.Combinations/) 
78 [子集](./QuestionBank/78.Subsets/) 
79 [单词搜索](./QuestionBank/79.Word%20Search/) 
82 [删除排序链表中的重复元素 II](./QuestionBank/82.Remove%20Duplicates%20from%20Sorted%20List%20II/) 
83 [删除排序链表中的重复元素](./QuestionBank/83.Remove%20Duplicates%20from%20Sorted%20List/) 
88 [合并两个有序数组](./QuestionBank/88.Merge%20Sorted%20Array/) 
93 [复原IP地址](./QuestionBank/93.Restore%20IP%20Addresses/) 
94 [二叉树的中序遍历](./QuestionBank/94.Binary%20Tree%20Inorder%20Traversal/) 
98 [验证二叉搜索树](./QuestionBank/98.Validate%20Binary%20Search%20Tree/) 
100 [相同的树](./QuestionBank/100.Same%20Tree/) 
101 [对称二叉树](./QuestionBank/101.Symmetric%20Tree/) 
102 [二叉树的层次遍历](./QuestionBank/102.Binary%20Tree%20Level%20Order%20Traversal/) 
103 [二叉树的锯齿形层序遍历](./QuestionBank/103.Binary%20Tree%20Zigzag%20Level%20Order%20Traversal/) 
104 [二叉树的最大深度](./QuestionBank/104.Maximum%20Depth%20of%20Binary%20Tree/) 
107 [二叉树的层次遍历 II](./QuestionBank/107.Binary%20Tree%20Level%20Order%20Traversal%20II/) 
108 [将有序数组转换为二叉搜索树](./QuestionBank/108.Convert%20Sorted%20Array%20to%20Binary%20Search%20Tree/) 
110 [平衡二叉树](./QuestionBank/110.Balanced%20Binary%20Tree/) 
111 [二叉树的最小深度](./QuestionBank/111.Minimum%20Depth%20of%20Binary%20Tree/) 
112 [路径总和](./QuestionBank/112.Path%20Sum/) 
113 [路径总和 II](./QuestionBank/113.Path%20Sum%20II/) 
114 [二叉树展开为链表](./QuestionBank/114.Flatten%20Binary%20Tree%20to%20Linked%20List/) 
116 [填充同一层的兄弟节点](./QuestionBank/116.Populating%20Next%20Right%20Pointers%20in%20Each%20Node/) 
118 [杨辉三角](./QuestionBank/118.Pascal's%20Triangle/) 
117 [填充每个节点的下一个右侧节点指针 II](./QuestionBank/117.Populating%20Next%20Right%20Pointers%20in%20Each%20Node%20II/) 
119 [杨辉三角 II](./QuestionBank/119..Pascal's%20Triangle%20II/) 
120 [三角形最小路径和](./QuestionBank/120.Triangle/) 
121 [买卖股票的最佳时机](./QuestionBank/121.Best%20Time%20to%20Buy%20and%20Sell%20Stock/) 
122 [买卖股票的最佳时机](./QuestionBank/122.Best%20Time%20to%20Buy%20and%20Sell%20Stock%20II/) 
125 [验证回文字符串](./QuestionBank/125.Valid%20Palindrome/) 
129 [求根到叶子节点数字之和](./QuestionBank/129.Sum%20Root%20to%20Leaf%20Numbers/) 
131 [分割回文串](./QuestionBank/131.Palindrome%20Partitioning/) 
136 [只出现一次的数字](./QuestionBank/136.Single%20Number/) 
137 [只出现一次的数字 II](./QuestionBank/137.Single%20Number%20II/) 
139 [单词分割](./QuestionBank/139.Word%20Break/) 
140 [单词分割 II](./QuestionBank/140.Word%20Break%20II/) 
141 [环形链表](./QuestionBank/141.Linked%20List%20Cycle/) 
142 [环形链表 II](./QuestionBank/142.Linked%20List%20Cycle%20II/) 
144 [二叉树的前序遍历](./QuestionBank/144.Binary%20Tree%20Preorder%20Traversal/) 
145 [二叉树的后序遍历](./QuestionBank/145.Binary%20Tree%20Postorder%20Traversal/) 
146 [LRU缓存机制](./QuestionBank/146.LRU%20Cache/) 
147 [对链表进行插入排序](./QuestionBank//) 
148 [排序链表](./QuestionBank/148.Sort%20List/) 
151 [翻转字符串里的单词](./QuestionBank/151.Reverse%20Words%20in%20a%20String/) 
155 [最小栈](./QuestionBank/155.Min%20Stack/) 
152 [乘积最大子序列](./QuestionBank/152.Maximum%20Product%20Subarray/) 
153 [寻找旋转排序数组中的最小值](./QuestionBank/153.Find%20Minimum%20in%20Rotated%20Sorted%20Array/) 
160 [相交链表](./QuestionBank/160.Intersection%20of%20Two%20Linked%20Lists/) 
164 [最大间距](./QuestionBank/164.Maximum%20Gap/) 
162 [寻找峰值](./QuestionBank/162.Find%20Peak%20Element/) 
167 [两数之和 II - 输入有序数组](./QuestionBank/167.Two%20Sum%20II%20-%20Input%20array%20is%20sorted/) 
168 [Excel表列名称](./QuestionBank/168.Excel%20Sheet%20Column%20Title/) 
169 [求众数](./QuestionBank/169.Majority%20Element/) 
171 [Excel表列序号](./QuestionBank/171.Excel%20Sheet%20Column%20Number/) 
172 [阶乘后的零](./QuestionBank/172.Factorial%20Trailing%20Zeroes/) 
189 [旋转数据](./QuestionBank/189.Rotate%20Array/) 
190 [颠倒二进制位](./QuestionBank/190.Reverse%20Bits/) 
191 [位1的个数](./QuestionBank/191.Number%20of%201%20Bits/) 
198 [打家劫舍](./QuestionBank/198.House%20Robber/) 
202 [快乐数](./QuestionBank/202.Happy%20Number/) 
203 [删除链表中的节点](./QuestionBank/203.Remove%20Linked%20List%20Elements/) 
204 [计数质数](./QuestionBank/204.Count%20Primes/) 
205 [同构字符串](./QuestionBank/205.Isomorphic%20Strings/) 
206 [反转链表](./QuestionBank/206.Reverse%20Linked%20List/) 
208 [实现 Trie (前缀树)](./QuestionBank/208.Implement%20Trie%20(Prefix%20Tree)/) 
215 [数组中的第K个最大元素](./QuestionBank/215.Kth%20Largest%20Element%20in%20an%20Array/) 
216 [组合总和 III](./QuestionBank/216.Combination%20Sum%20III/) 
217 [存在重复](./QuestionBank/217.Contains%20Duplicate/) 
219 [存在重复元素 II](./QuestionBank/219.Contains%20Duplicate%20II/) 
221 [最大正方形](./QuestionBank/221.Maximal%20Square/) 
223 [矩形面积](./QuestionBank/223.Rectangle%20Area/) 
225 [用队列实现栈](./QuestionBank/225.Implement%20Stack%20using%20Queues/) 
226 [翻转二叉树](./QuestionBank/226.Invert%20Binary%20Tree/) 
230 [二叉搜索树中第K小的元素](./QuestionBank/230.Kth%20Smallest%20Element%20in%20a%20BST/) 
231 [2的幂](./QuestionBank/231.Power%20of%20Two/) 
232 [用栈实现队列](./QuestionBank/232.Implement%20Queue%20using%20Stacks/) 
234 [回文链表](./QuestionBank/234.Palindrome%20Linked%20List/) 
235 [二叉搜索树的最近公共祖先](./QuestionBank/235.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Search%20Tree/) 
236 [二叉树的最近公共祖先](./QuestionBank/236.Lowest%20Common%20Ancestor%20of%20a%20Binary%20Tree/) 
237 [删除链表的结点](./QuestionBank/237.Delete%20Node%20in%20a%20Linked%20List/) 
238 [除自身以外数组的乘积](./QuestionBank/238.Product%20of%20Array%20Except%20Self/) 
240 [搜索二维矩阵 II](./QuestionBank/240.Search%20a%202D%20Matrix%20II/) 
242 [有效的字母异位词](./QuestionBank/242.Valid%20Anagram/) 
257 [二叉树的所有路径](./QuestionBank/257.Binary%20Tree%20Paths/) 
258 [各位相加](./QuestionBank/258.Add%20Digits/) 
260 [只出现一次的数字 III](./QuestionBank/260.Single%20Number%20III/) 
268 [缺失数字](./QuestionBank/268.Missing%20Number/) 
278 [第一个错误的版本](./QuestionBank/278.First%20Bad%20Version/) 
283 [移动零](./QuestionBank/283.Move%20Zeroes/) 
284 [顶端迭代器](./QuestionBank/284.Peeking%20Iterator/) 
287 [寻找重复数](./QuestionBank/287.Find%20the%20Duplicate%20Number/) 
290 [单词模式](./QuestionBank/290.Word%20Pattern/) 
295 [数据流的中位数](./QuestionBank/295.Find%20Median%20from%20Data%20Stream/) 
299 [猜数字游戏](./QuestionBank/299.Bulls%20and%20Cows/) 
303 [区域和检索 - 数组不可变](./QuestionBank/303.Range%20Sum%20Query%20-%20Immutable/) 
322 [零钱兑换](./QuestionBank/322.Coin%20Change/) 
326 [3的幂](./QuestionBank/326.Power%20of%20Three/) 
328 [奇偶链表](./QuestionBank/328.Odd%20Even%20Linked%20List/) 
338 [Bit位计数](./QuestionBank/338.Counting%20Bits/) 
342 [4的幂](./QuestionBank/342.Power%20of%20Four/) 
344 [反转字符串](./QuestionBank/344.Reverse%20String/) 
345 [反转字符串中的元音字母](./QuestionBank/345.Reverse%20Vowels%20of%20a%200String/) 
347 [前K个高频元素](./QuestionBank/347.Top%20K%20Frequent%20Elements/) 
349 [两个数组的交集](./QuestionBank/349.Intersection%20of%20Two%20Arrays/) 
350 [两个数组的交集 II](./QuestionBank/350.Intersection%20of%20Two%20Arrays%20II/) 
367 [有效的完全平方数](./QuestionBank/367.Valid%20Perfect%20Square) 
371 [两整数之和](./QuestionBank/371.Sum%20of%20Two%20Integers/) 
374 [猜数字大小](./QuestionBank/374.Guess%20Number%20Higher%20or%20Lower/) 
382 [链表随机节点](./QuestionBank/382.Linked%20List%20Random%20Node/) 
384 [打乱数组](./QuestionBank/384.Shuffle%20an%20Array/) 
385 [迷你语法分析器](./QuestionBank/385.Mini%20Parser/) 
387 [字符串中的第一个唯一字符](./QuestionBank/387.First%20Unique%20Character%20in%20a%20String/) 
389 [找不同](./QuestionBank/389.Find%20the%20Difference/) 
392 [判断子序列](./QuestionBank/392.Is%20Subsequence/) 
397 [整数替换](./QuestionBank/397.Integer%20Replacement/) 
404 [左叶子之和](./QuestionBank/404.Sum%20of%20Left%20Leaves/) 
405 [数字转换为十六进制数](./QuestionBank/405.Convert%20a%20Number%20to%20Hexadecimal/) 
412 [Fizz Buzz](./QuestionBank/412.Fizz%20Buzz/) 
414 [第三大的数](./QuestionBank/414.Third%20Maximum%20Number/) 
415 [字符串相加](./QuestionBank/415.Add%20Strings/) 
429 [N叉树的层序遍历](./QuestionBank/429.N-ary%20Tree%20Level%20Order%20Traversal/) 
430 [扁平化多级双向链表](./QuestionBank/430.Flatten%20a%20Multilevel%20Doubly%20Linked%20List/) 
434 [字符串中的单词数](./QuestionBank/434.Number%20of%20Segments%20in%20a%20String/) 
442 [数组中重复的数据](./QuestionBank/442.Find%20All%20Duplicates%20in%20an%20Array/) 
445 [两数相加 II](./QuestionBank/445.Add%20Two%20Numbers%20II/) 
448 [找到所有数组中消失的数字](./QuestionBank/448.Find%20All%20Numbers%20Disappeared%20in%20an%20Array/) 
451 [根据字符出现频率排序](./QuestionBank/451.Sort%20Characters%20By%20Frequency/) 
454 [四数相加 II](./QuestionBank/454.4Sum%20II/) 
458 [重复的子字符串](./QuestionBank/459.Repeated%20Substring%20Pattern/) 
461 [汉明距离](./QuestionBank/461.Hamming%20Distance/) 
476 [数字的补数](./QuestionBank/476.Number%20Complement/) 
485 [最大连续1的个数](./QuestionBank/485.Max%20Consecutive%20Ones/) 
486 [预测赢家](./QuestionBank/486.Predict%20the%20Winner/) 
495 [提莫攻击](./QuestionBank/495.Teemo%20Attacking/) 
501 [二叉搜索树中的众数](./QuestionBank/501.Find%20Mode%20in%20Binary%20Search%20Tree/) 
509 [斐波那契数](./QuestionBank/509.Fibonacci%20Number/) 
515 [在每个树行中找最大值](./QuestionBank/515.Find%20Largest%20Value%20in%20Each%20Tree%20Row/) 
520 [检测大写字母](./QuestionBank/520.Detect%20Capital/) 
530 [二叉搜索树的最小绝对差](./QuestionBank/530.Minimum%20Absolute%20Difference%20in%20BST/) 
537 [复数乘法](./QuestionBank/537.Complex%20Number%20Multiplication/) 
538 [把二叉搜索树转换为累加树](./QuestionBank/538.Convert%20BST%20to%20Greater%20Tree/) 
551 [学生出勤纪录 I](./QuestionBank/551.Student%20Attendance%20Record%20I/) 
557 [反转字符串中的单词 III](./QuestionBank/557.Reverse%20Words%20in%20a%20String%20III/) 
559 [N叉树的最大深度](./QuestionBank/559.Maximum%20Depth%20of%20N-ary%20Tree/) 
560 [和为K的子数组](./QuestionBank/560.Subarray%20Sum%20Equals%20K/) 
561 [数组拆分 I](./QuestionBank/561.Array%20Partition%20I/) 
566 [重塑矩阵](./QuestionBank/566.Reshape%20the%20Matrix/) 
567 [字符串的排列](./QuestionBank/567.Permutation%20in%20String/) 
572 [另一个树的子树](./QuestionBank/572.Subtree%20of%20Another%20Tree/) 
575 [分糖果](./QuestionBank/575.Distribute%20Candies/) 
589 [N叉树的前序遍历](./QuestionBank/589.N-ary%20Tree%20Preorder%20Traversal/) 
590 [N叉树的后序遍历](./QuestionBank/590.N-ary%20Tree%20Postorder%20Traversal/) 
617 [合并二叉树](./QuestionBank/617.Merge%20Two%20Binary%20Trees/) 
622 [设计循环队列](./QuestionBank/622.Design%20Circular%20Queue/) 
628 [三个数的最大乘积](./QuestionBank/628.Maximum%20Product%20of%20Three%20Numbers/) 
633 [平方数之和](./QuestionBank/633.Sum%20of%20Square%20Numbers/) 
637 [二叉树的层平均值](./QuestionBank/637.Average%20of%20Levels%20in%20Binary%20Tree/) 
643 [子数组最大平均数 I](./QuestionBank/643.Maximum%20Average%20Subarray%20I/) 
648 [单词替换](./QuestionBank/648.Replace%20Words/) 
657 [机器人能否返回原点](./QuestionBank/657.Robot%20Return%20to%20Origin/) 
658 [找到 K 个最接近的元素](./QuestionBank/658.Find%20K%20Closest%20Elements/) 
665 [非递减数列](./QuestionBank/665.Non-decreasing%20Array/) 
670 [最大交换](./QuestionBank/670.Maximum%20Swap/) 
674 [最长连续递增序列](./QuestionBank/674.Longest%20Continuous%20Increasing%20Subsequence/) 
677 [键值映射](./QuestionBank/677.Map%20Sum%20Pairs/) 
680 [验证回文字符串 Ⅱ](./QuestionBank/680.Valid%20Palindrome%20II/) 
682 [棒球比赛](./QuestionBank/682.Baseball%20Game/) 
693 [交替位二进制数](./QuestionBank/693.Binary%20Number%20with%20Alternating%20Bits/) 
700 [二叉搜索树中的搜索](./QuestionBank/700.Search%20in%20a%20Binary%20Search%20Tree/) 
704 [二分查找](./QuestionBank/704.Binary%20Search/) 
705 [设计哈希集合](./QuestionBank/705.Design%20HashSet/) 
706 [设计哈希映射](./QuestionBank/706.Design%20HashMap/) 
707 [设计链表](./QuestionBank/707.Design%20Linked%20List/) 
709 [转换成小写字母](./QuestionBank/709.To%20Lower%20Case/) 
724 [寻找数组的中心索引](./QuestionBank/724.Find%20Pivot%20Index/) 
728 [自除数](./QuestionBank/728.Self%20Dividing%20Numbers/) 
738 [单调递增的数字](./QuestionBank/738.Monotone%20Increasing%20Digits/) 
739 [每日温度](./QuestionBank/739.Daily%20Temperatures/) 
744 [寻找比目标字母大的最小字母](./QuestionBank/744.Find%20Smallest%20Letter%20Greater%20Than%20Target/) 
747 [至少是其他数字两倍的最大数](./QuestionBank/747.Largest%20Number%20At%20Least%20Twice%20of%20Others/) 
762 [二进制表示中质数个计算置位](./QuestionBank/762.Prime%20Number%20of%20Set%20Bits%20in%20Binary%20Representation/) 
766 [托普利茨矩阵](./QuestionBank/766.Toeplitz%20Matrix/) 
771 [宝石与石头](./QuestionBank/771.Jewels%20and%20Stones/) 
783 [二叉搜索树节点最小距离](./QuestionBank/783.Minimum%20Distance%20Between%20BST%20Nodes/) 
781 [森林中的兔子](./QuestionBank/781.Rabbits%20in%20Forest/) 
796 [旋转字符串](./QuestionBank/796.Rotate%20String/) 
804 [唯一摩尔斯密码词](./QuestionBank/804.Unique%20Morse%20Code%20Words/) 
807 [保持城市天际线](./QuestionBank/807.Max%20Increase%20to%20Keep%20City%20Skyline/) 
811 [子域名访问计数](./QuestionBank/811.Subdomain%20Visit%20Count/) 
821 [字符的最短距离](./QuestionBank/821.Shortest%20Distance%20to%20a%20Character/) 
830 [较大分组的位置](./QuestionBank/830.Positions%20of%20Large%20Groups/) 
832 [翻转图像](./QuestionBank/832.Flipping%20an%20Image/) 
844 [比较含退格的字符串](./QuestionBank/844.Backspace%20String%20Compare/) 
852 [山脉数组的峰顶索引](./QuestionBank/852.Peak%20Index%20in%20a%20Mountain%20Array/) 
860 [柠檬水找零](./QuestionBank/860.Lemonade%20Change/) 
867 [转置矩阵](./QuestionBank/867.Transpose%20Matrix/) 
868 [二进制间距](./QuestionBank/868.Binary%20Gap/) 
875 [爱吃香蕉的珂珂](./QuestionBank/875.Koko%20Eating%20Bananas/) 
876 [链表的中间结点](./QuestionBank/876.Middle%20of%20the%20Linked%20List/) 
884 [两句话中的不常见单词](./QuestionBank/884.Uncommon%20Words%20from%20Two%20Sentences/) 
896 [单调数列](./QuestionBank/896.Monotonic%20Array/) 
897 [递增顺序查找树](./QuestionBank/897.Increasing%20Order%20Search%20Tree/) 
905 [按奇偶排序数组](./QuestionBank/905.Sort%20Array%20By%20Parity/) 
921 [使括号有效的最少添加](./QuestionBank/921.Minimum%20Add%20to%20Make%20Parentheses%20Valid/) 
922 [按奇偶排序数组 II](./QuestionBank/922.Sort%20Array%20By%20Parity%20II/) 
925 [长按键入](./QuestionBank/925.Long%20Pressed%20Name/) 
941 [有效的山脉数组](./QuestionBank/941.Valid%20Mountain%20Array/) 
933 [最近的请求次数](./QuestionBank/933.Number%20of%20Recent%20Calls/) 
938 [二叉搜索树的范围和](./QuestionBank/938.Range%20Sum%20of%20BST/) 
942 [增减字符串匹配](./QuestionBank/942.DI%20String%20Match/) 
961 [重复 N 次的元素](./QuestionBank/961.N-Repeated%20Element%20in%20Size%202N%20Array/) 
965 [单值二叉树](./QuestionBank/965.Univalued%20Binary%20Tree/) 
970 [强整数](./QuestionBank/970.Powerful%20Integers/) 
973 [最接近原点的 K 个点](./QuestionBank/973.K%20Closest%20Points%20to%20Origin/) 
974 [和可被 K 整除的子数组](./QuestionBank/974.Subarray%20Sums%20Divisible%20by%20K/) 
976 [三角形的最大周长](./QuestionBank/976.Largest%20Perimeter%20Triangle/) 
977 [有序数组的平方](./QuestionBank/977.Squares%20of%20a%20Sorted%20Array/) 
985 [查询后的偶数和](./QuestionBank/985.Sum%20of%20Even%20Numbers%20After%20Queries/) 
989 [数组形式的整数加法](./QuestionBank/989.Add%20to%20Array-Form%20of%20Integer/) 
993 [二叉树的堂兄弟节点](./QuestionBank/993.Cousins%20in%20Binary%20Tree/) 
1002 [查找常用字符](./QuestionBank/1002.Find%20Common%20Characters/) 
1006 [笨阶乘](./QuestionBank/1006.Clumsy%20Factorial/) 
1012 [十进制整数的反码](./QuestionBank/1012.Complement%20of%20Base%2010%20Integer/) 
1021 [删除最外层的括号](./QuestionBank/1021.Remove%20Outermost%20Parentheses/) 
1038 [从二叉搜索树到更大和树](./QuestionBank/1038.Binary%20Search%20Tree%20to%20Greater%20Sum%20Tree/) 
1046 [最后一块石头的重量](./QuestionBank/1046.Last%20Stone%20Weight/) 
1051 [高度检查器](./QuestionBank/1051.Height%20Checker/) 
1108 [IP 地址无效化](./QuestionBank/1108.Defanging%20an%20IP%20Address/) 
1128 [等价多米诺骨牌对的数量](./QuestionBank/1128.Number%20of%20Equivalent%20Domino%20Pairs/) 
1137 [第 N 个泰波那契数](./QuestionBank/1137.N-th%20Tribonacci%20Number/) 
1154 [一年中的第几天](./QuestionBank/1154.Day%20of%20the%20Year/) 
1161 [最大层内元素和](./QuestionBank/1161.Maximum%20Level%20Sum%20of%20a%20Binary%20Tree/) 
1175 [质数排列](./QuestionBank/1175.Prime%20Arrangements/) 
1185 [一周中的第几天](./QuestionBank/1185.Day%20of%20the%20Week/) 
1189 [“气球” 的最大数量](./QuestionBank/1189.Maximum%20Number%20of%20Balloons/) 
1207 [独一无二的出现次数](./QuestionBank/1207.Unique%20Number%20of%20Occurrences/) 
1213 [三个有序数组的交集](./QuestionBank/1213.Intersection%20of%20Three%20Sorted%20Arrays/) 
1217 [玩筹码](./QuestionBank/1217.Minimum%20Cost%20to%20Move%20Chips%20to%20The%20Same%20Position/) 
1218 [最长定差子序列](./QuestionBank/1218.Longest%20Arithmetic%20Subsequence%20of%20Given%20Difference/) 
1232 [缀点成线](./QuestionBank/1232.Check%20If%20It%20Is%20a%20Straight%20Line/) 
1249 [移除无效的括号](./QuestionBank/1249.Minimum%20Remove%20to%20Make%20Valid%20Parentheses/) 
1266 [访问所有点的最小时间](./QuestionBank/1266.Minimum%20Time%20Visiting%20All%20Points/) 
1281 [整数的各位积和之差](./QuestionBank/1281.Subtract%20the%20Product%20and%20Sum%20of%20Digits%20of%20an%20Integer/) 
1295 [统计位数为偶数的数字](./QuestionBank/1295.Find%20Numbers%20with%20Even%20Number%20of%20Digits/) 
1313 [解压缩编码列表](./QuestionBank/1313.Decompress%20Run-Length%20Encoded%20List/) 
1342 [将数字变成 0 的操作次数](./QuestionBank/1342.Number%20of%20Steps%20to%20Reduce%20a%20Number%20to%20Zero/) 
1356 [根据数字二进制下 1 的数目排序](./QuestionBank/1356.Sort%20Integers%20by%20The%20Number%20of%201%20Bits/) 
1365 [有多少小于当前数字的数字](./QuestionBank/1365.How%20Many%20Numbers%20Are%20Smaller%20Than%20the%20Current%20Number/) 
1389 [按既定顺序创建目标数组](./QuestionBank/1389.Create%20Target%20Array%20in%20the%20Given%20Order/) 
1403 [非递增顺序的最小子序列](./QuestionBank/1403.Minimum%20Subsequence%20in%20Non-Increasing%20Order/) 
1431 [拥有最多糖果的孩子](./QuestionBank/1431.Kids%20With%20the%20Greatest%20Number%20of%20Candies/) 
1470 [重新排列数组](./QuestionBank/1470.Shuffle%20the%20Array/) 
1480 [一维数组的动态和](./QuestionBank/1480.Running%20Sum%20of%201d%20Array/) 
1486 [数组异或操作](./QuestionBank/1486.XOR%20Operation%20in%20an%20Array/) 
1512 [好数对的数目](./QuestionBank/1512.Number%20of%20Good%20Pairs/) 
1518 [换酒问题](./QuestionBank/1518.Water%20Bottles/) 
1556 [千位分隔数](./QuestionBank/1556.Thousand%20Separator/) 
1572 [矩阵对角线元素的和](./QuestionBank/1572.Matrix%20Diagonal%20Sum/) 
1598 [文件夹操作日志搜集器](./QuestionBank/1598.Crawler%20Log%20Folder/) 
1603 [设计停车系统](./QuestionBank/1603.Design%20Parking%20System/) 
1614 [括号的最大嵌套深度](./QuestionBank/1614.Maximum%20Nesting%20Depth%20of%20the%20Parentheses/) 
1662 [检查两个字符串数组是否相等](./QuestionBank/1662.Check%20If%20Two%20String%20Arrays%20are%20Equivalent/) 
1672 [最富有客户的资产总量](./QuestionBank/1672.Richest%20Customer%20Wealth/) 
1721 [交换链表中的节点](./QuestionBank/1721.Swapping%20Nodes%20in%20a%20Linked%20List/) 
1748 [唯一元素的和](./QuestionBank/1748.Sum%20of%20Unique%20Elements/) 
1784 [检查二进制字符串字段](./QuestionBank/1784.Check%20if%20Binary%20String%20Has%20at%20Most%20One%20Segment%20of%20Ones/) 
2032 [至少在两个数组中出现的值](./QuestionBank/2032.Two%20Out%20of%20Three/) 
2287 [重排字符形成目标字符串](./QuestionBank/2287.Rearrange%20Characters%20to%20Make%20Target%20String/) 
2481 [分割圆的最少切割次数](./QuestionBank/2481.Minimum%20Cuts%20to%20Divide%20a%20Circle/) 
5738 [K 进制表示下的各位数字总和](./QuestionBank/5738.Sum%20of%20Digits%20in%20Base%20K/)

## 面试题

01.01 [判定字符是否唯一](./interviewQuestion/01.01.Is%20Unique%20LCCI) 
01.05 [一次编辑](./interviewQuestion/01.05.One%20Away%20LCCI) 
02.05 [链表求和](./interviewQuestion/02.05.Sum%20Lists%20LCCI) 
16.01 [交换数字](./interviewQuestion/16.01.Swap%20Numbers%20LCCI) 
16.02 [单词频率](./interviewQuestion/16.02.Words%20Frequency%20LCCI) 
17.04 [消失的数字](./interviewQuestion/17.04.Missing%20Number%20LCCI) 
17.10 [主要元素](./interviewQuestion/17.10.Find%20Majority%20Element%20LCCI) 
17.11 [单词距离](./interviewQuestion/17.11.Find%20Closest%20LCCI) 
17.14 [最小K个数](./interviewQuestion/17.14.Smallest%20K%20LCCI) 
17.22 [单词转换](./interviewQuestion/17.22.Word%20Transformer%20LCCI) 
剑指 Offer 64 [剑指 Offer 64.求1+2+…+n](./interviewQuestion/剑指%20Offer%2064.求1+2+…+n/) 
剑指 Offer II 074 [剑指 Offer II 074.合并区间](./interviewQuestion/剑指%20Offer%20II%20074.合并区间)

## LCP

1 [猜数字](./LCP/1.Guess%20Numbers/) 
6 [拿硬币](./LCP/6.Take%20Coins/) 
33 [蓄水](./LCP/33.Store%20Water/) 
77 [符文储备](./LCP/77.rune%20reserve/)

## LCR

36 [蓄水](./LCR/36.Evaluate%20the%20inverse%20Polish%20expression/)

## 声明

代码仅供参考，如有不恰当、不正确的地方，欢迎批评指正，谢谢……

LeetCode-Python

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