Update time: Wed May 29 15:26:26 CST 2019
I have solved 114 / 1092 problems while 976 problems are still locked.
| # | Title | Source Code | Related Topics | Explanation | Difficulty | remarks |
|---|---|---|---|---|---|---|
| 561 | Array Partition I | Java | Array | 数组分组I | Easy | |
| 832 | Flipping an Image | Java | Array | 翻转图像 | Easy | |
| 867 | Transpose Matrix | Java | Array | 矩阵的转置 | Easy | |
| 766 | Toeplitz Matrix | Java | Array | Toeplitz矩阵 | Easy | |
| 888 | Fair Candy Swap | Java | Array | 公平糖果交换 | Easy | |
| 485 | Max Consecutive Ones | Java | Array | 找出给定数组中最大连续1的个数 | Easy | |
| 896 | Monotonic Array | Java | Array | 单调数据 | Easy | |
| 448 | Find All Numbers Disappeared in an Array | Java | Array | 找出数组中所有不出现的数值 | Easy | |
| 169 | Majority Element | Java | Array | 数组中多数派元素 | Easy | |
| 697 | Degree of an Array | Java | Array | 数组的度 | Easy | |
| 268 | Missing Number | Java | Array | 缺失的数字 | Easy | |
| 561 | Array Partition I | Java | Array | 数组分组I | Easy | |
| 926 | Flip String to Monotone Increasing | Java | Array | 单调递增的字符串 | Medium | |
| 941 | Valid Mountain Array | Java | Array | 验证山峰数组 | Medium | |
| 55 | Jump Game | Java | Array | Medium | ||
| 21 | Merge Two Sorted Lists | Java | Linked List | 合并给定顺序的两个链表 | Easy | |
| 234 | Palindrome Linked List | Java | Linked List | 回文单链表翻转 | Easy | |
| 206 | Reverse Linked List | Java | Linked List | 单链表翻转 | Easy | |
| 461 | Hamming Distance | Java | Bit | hanming距离 | Easy | |
| 191 | Number of 1 Bits | Java | Bit | 1的bit数 | Easy | |
| 136 | Single Number | Java | Bit | 单个数字(包含bit/hash方法) | Easy | |
| 137 | Single Number II | Java | Bit | 单个数字 (bit方法) | Easy | |
| 754 | Reach a Number | Java | Bit | 到达一个目标数字的最少步数 | Easy | |
| 709 | To Lower Case | Java | String | 字符串转换小写 | Easy | |
| 804 | Unique Morse Code Words | Java | String | 唯一的莫斯单词 | Easy | |
| 344 | Reverse String | Java | String | 翻转字符串 | Easy | |
| 345 | Reverse Vowels of a String | Java | String | 翻转元音字符串 | Easy | |
| 125 | Valid Palindrome | Java | String | 验证回文串 | Easy | |
| 9 | Palindrome Number | Java | String | 回文数字 | Easy | |
| 771 | Jewels and Stones | Java | Hash | 宝石和石头 | Easy | |
| 1 | Two Sum | Java | Hash | 两数之和 | Easy | |
| 594 | Longest Harmonious Subsequence | Java | Hash | 最长和谐子序列的长度 | Easy | |
| 540 | Single Element in a Sorted Array | Java | 数组中找出single元素 | Medium | ||
| 811 | Subdomain Visit Count | Java | Hash | 子域名访问计数 | Easy | |
| 525 | Contiguous Array | Java | Hash | 连续数组 | Medium | |
| 961 | N-Repeated Element in Size 2N Array | Java | Hash | 2N矩阵中N重复元素 | Easy | |
| 500 | Keyboard Row | Java | Hash | 键盘行数 | Easy | |
| 884 | Uncommon Words from Two Sentences | Java | Hash | 两句话中不常见的词汇 | Easy | |
| 463 | Island Perimeter | Java | Hash | 计算岛屿长度 | Easy | |
| 438 | Find All Anagrams in a String | Java | Hash | 找到字符串中所有字母异位词 | Medium | |
| 242 | Valid Anagram | Java | Sort | Easy | ||
| 922 | Sort Array By Parity II | Java | Sort | 奇偶顺序排序 | Easy | |
| 524 | Longest Word in Dictionary through Deleting | Java | Sort | 通过删除给定的字符串找到最小字典顺序的最长单词 | Medium | |
| 26 | Remove Duplicates from Sorted Array | Java | Sort | 从排好序的数组中删除重复数据 | Easy | |
| 958 | Check Completeness of a Binary Tree | Java | Tree | 验证完全二叉树 | Medium | |
| 653 | Two Sum IV - Input is a BST | Java | Tree | 两数之和-输入是BST | Easy | |
| 965 | Univalued Binary Tree | Java | Tree | 唯一二叉树 | Easy | |
| 700 | Search in a Binary Search Tree | Java | Tree | BST查找 | Easy | |
| 617 | Merge Two Binary Trees | Java | Tree | merge两个二叉树 | Easy | |
| 589 | N-ary Tree Preorder Traversal | Java | Tree | 三叉树的前序遍历 | Easy | |
| 590 | N-ary Tree Postorder Traversal | Java | Tree | 三叉树的后续遍历 | Easy | |
| 429 | N-ary Tree Level Order Traversal | Java | Tree | 三叉树的层序遍历 | Easy | |
| 559 | Maximum Depth of N-ary Tree | Java | Tree | 求三叉树的深度 | Easy | |
| 104 | Maximum Depth of Binary Tree | Java | Tree | 求二叉树的深度 | Easy | |
| 987 | Increasing Order Search Tree | Java | Tree | 递增顺序查找树 | Easy | |
| 872 | Leaf-Similar Trees | Java | Tree | 叶子节点相似的树 | Easy | |
| 637 | Average of Levels in Binary Tree | Java | Tree | 二叉树的层平均值 | Easy | |
| 226 | Invert Binary Tree | Java | Tree | 翻转二叉树 | Easy | |
| 1022 | Sum of Root To Leaf Binary Numbers | Java | Tree | 从根到叶的二进制数之和 | Easy | |
| 993 | Cousins in Binary Tree | Java | Tree | 堂兄弟节点 | Easy | |
| 925 | Long Pressed Name | Java | two point / String | 长按名称 | Easy | |
| 343 | Integer Break | Java | Math | 数字拆分 | Medium | |
| 491 | Increasing Subsequences | Java | dfs | 递增序列 | Medium | |
| 133 | Clone Graph | Java | dfs | 克隆图 | Medium | |
| 417 | Pacific Atlantic Water Flow | Java Go | dfs | 太平洋大西洋水流问题 | Medium | 二维数组DFS基本技能处理 |