14-Longest Common Prefix(最长前缀)
√21-Merge Two Sorted Lists(合并两个有序链表)
22-Generate Parentheses(列举所有括号对)
24-Swap Nodes in Pairs(成对交换链表节点)
26-Remove Duplicates from Sorted Array(移除数组中重复元素)
28-Implement strStr()(实现字符串函数)
√35-Search Insert Position(在有序数组中寻找插入数字的位置)
58-Length of Last Word(最后一个单词的长度)
74-Search a 2D Matrix(在有序二维矩阵中找数)
83-Remove Duplicates From Sorted List(移除有序链表中的重复元素)
88-Merge Sorted Array(合并两个有序数组)
94-Binary Tree Inorder Traversal(二叉树中序遍历)
√102-Binary Tree Level Order Traversal(二叉树层次遍历)
104-Maximum Depth of Binary Tree(二叉树最大深度)
107-Binary Tree Level Order Traversal2(二叉树层次遍历2)
110-Balanced Binary Tree(判断二叉树是否平衡)
111-Minimum Depth of Binary Tree(二叉树的最小深度)
119-Pascal's Triangle II(帕斯卡三角形II)
121-Best Time to Buy and Sell Stock(买进卖出股票最佳时机)
122-Best Time to Buy and Sell Stock II(买进卖出股票的最佳时机II)
125-Valid Palindrome(判断字符串是否对称)
141-Linked List Cycle(判断链表是否有环)
√144-Binary Tree Preorder Traversal(二叉树前序遍历)
√145-Binary Tree Postorder Traversal(二叉树后序遍历)
168-Excel Sheet Column Title(数字对应excel字母)
√169-Majority Element(出现次数过半的元素)
172-Factorial Trailing Zeroes(阶乘结尾0的个数)
182-Duplicate Emails(SQL语句寻找冗余)
196-Delete Duplicate Emails(删除多余邮件)
√203-Remove Linked List Elements(移除链表指定元素)
√206-Reverse Linked List(链表翻转)
207-Course Schedule(先修课程-判断有向图是否有环)
217-Contains Duplicate(检验是否有重复数字)
219-Contains Duplicate II(检验是否有重复数字2)
220-Contains Duplicate III(检验是否有重复数字3)
225-Implement Stack using Queues(用队列实现堆栈)
226-Invert Binary Tree-E(二叉树翻转)
231-Power of Two(判断一个数是否是2的次幂)
234-Palindrome Linked List(回文链表)
237-Delete Node in a Linked List(删除链表节点)
278-First Bad Version(寻找第一个次品)
345-Reverse Vowels of a String(仅翻转字符串的元音字母)
349-Intersection of Two Arrays(两个数组的交集)
350-Intersection of Two Arrays II(求两个数组的交集2)
383-Ransom Note(第二个字符串里的字符能否组成第一个字符串)
404-Sum of Left Leaves(二叉树左叶子节点之和)
√442-Find All Duplicates in an Array(寻找数组里的冗余元素)
485-Max Consecutive Ones(最长的连续的1)
560-Subarray Sum Equals K(和为k的子数组总数)
617-Merge Two Binary Trees(合并两个二叉树)
690-Employee Importance(下属员工总权重)
695-Max Area of Island(岛屿的最大面积)
696-Count Binary Substrings(子串的个数)
697-Degree of an Array(和数组的度相同的连续最短子数组)
746-Min Cost Climbing Stairs(爬楼梯的最小代价)
771-Jewels and Stones(字符串包含函数练习)
852-Peak Index in a Mountain Array(山峰)
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