Swift LeetCode 目录 | Catalog（每周日更新......）
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说明：题目中含有$符号则为付费题目。
如：[Swift]LeetCode156.二叉树的上下颠倒 $ Binary Tree Upside Down
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| 序 号 | 题名Title | 难度 Difficulty |
| 1 | Easy | |
| 2 | Medium | |
| 3 | Medium | |
| 4 | 两个排序数组的中位数 | Median of Two Sorted Arrays | Hard |
| 5 | 最长回文子串 | Longest Palindromic Substring | Medium |
| 6 | Z字形变换 | ZigZag Conversion | Medium |
| 7 | 反转整数 | Reverse Integer | Easy |
| 8 | 字符串转整数 (atoi) | String to Integer (atoi) | Medium |
| 9 | 回文数 | Palindrome Number | Easy |
| 10 | 正则表达式匹配 | Regular Expression Matching | Hard |
| 11 | 盛最多水的容器 | Container With Most Water | Medium |
| 12 | 整数转罗马数字 | Integer to Roman | Medium |
| 13 | 罗马数字转整数 | Roman to Integer |
Easy |
| 14 | 最长公共前缀 | Longest Common Prefix | Easy |
| 15 | 三数之和 | 3Sum | Medium |
| 16 | 最接近的三数之和 | 3Sum Closest | Medium |
| 17 | 电话号码的字母组合 | Letter Combinations of a Phone Number | Medium |
| 18 | 四数之和 | 4Sum | Medium |
| 19 | 删除链表的倒数第N个节点 | Remove Nth Node From End of List | Medium |
| 20 | 有效的括号 | Valid Parentheses | Easy |
| 21 | 合并两个有序链表 | Merge Two Sorted Lists | Easy |
| 22 | 括号生成 | Generate Parentheses |
Medium |
| 23 | 合并K个排序链表 | Merge k Sorted Lists | Hard |
| 24 | 两两交换链表中的节点 | Swap Nodes in Pairs | Medium |
| 25 | k个一组翻转链表 | Reverse Nodes in k-Group | Hard |
| 26 | 删除排序数组中的重复项 | Remove Duplicates from Sorted Array | Easy |
| 27 | 移除元素 | Remove Element | Easy |
| 28 | 实现strStr() | Implement strStr() | Easy |
| 29 | 两数相除 | Divide Two Integers | Medium |
| 30 | 与所有单词相关联的字串 | Substring with Concatenation of All Words | Hard |
| 31 | 下一个排列 | Next Permutation | Medium |
| 32 | 最长有效括号 | Longest Valid Parentheses | Hard |
| 33 | 搜索旋转排序数组 | Search in Rotated Sorted Array | Medium |
| 34 | 在排序数组中查找元素的第一个和最后一个位置 | Find First and Last Position of Element in Sorted Array | Medium |
| 35 | 搜索插入位置 | Search Insert Position | Easy |
| 36 | 有效的数独 | Valid Sudoku | Medium |
| 37 | 解数独 | Sudoku Solver | Hard |
| 38 | 报数 | Count and Say | Easy |
| 39 | 组合总和 | Combination Sum | Medium |
| 40 | 组合总和 II | Combination Sum II | Medium |
| 41 | 缺失的第一个正数 | First Missing Positive | Hard |
| 42 | 接雨水 | Trapping Rain Water | Hard |
| 43 | 字符串相乘 | Multiply Strings | Medium |
| 44 | 通配符匹配 | Wildcard Matching | Hard |
| 45 | 跳跃游戏 II | Jump Game II | Hard |
| 46 | 全排列 | Permutations | Medium |
| 47 | 全排列 II | Permutations II | Medium |
| 48 | 旋转图像 | Rotate Image | Medium |
| 49 | 字母异位词分组 | Group Anagrams | Medium |
| 50 | Pow(x, n) | Pow(x, n) | Medium |
| 51 | N皇后 | N-Queens | Hard |
| 52 | N皇后 II | N-Queens II | Hard |
| 53 | 最大子序和 | Maximum Subarray | Easy |
| 54 | 螺旋矩阵 | Spiral Matrix | Medium |
| 55 | 跳跃游戏 | Jump Game | Medium |
| 56 | 合并区间 | Merge Intervals | Medium |
| 57 | 插入区间 | Insert Interval | Hard |
| 58 | 最后一个单词的长度 | Length of Last Word | Easy |
| 59 | 螺旋矩阵 II | Spiral Matrix II | Medium |
| 60 | 第k个排列 | Permutation Sequence | Medium |
| 61 | 旋转链表 | Rotate List | Medium |
| 62 | 不同路径 | Unique Paths | Medium |
| 63 | 不同路径 II | Unique Paths II | Medium |
| 64 | 最小路径和 | Minimum Path Sum | Medium |
| 65 | 有效数字 | Valid Number | Hard |
| 66 | 加一 | Plus One | Easy |
| 67 | 二进制求和 | Add Binary | Easy |
| 68 | 文本左右对齐 | Text Justification | Hard |
| 69 | x 的平方根 | Sqrt(x) | Easy |
| 70 | 爬楼梯 | Climbing Stairs | Easy |
| 71 | 简化路径 | Simplify Path | Medium |
| 72 | 编辑距离 | Edit Distance | Hard |
| 73 | 矩阵置零 | Set Matrix Zeroes | Medium |
| 74 | 搜索二维矩阵 | Search a 2D Matrix | Medium |
| 75 | 颜色分类 | Sort Colors | Medium |
| 76 | 最小覆盖子串 | Minimum Window Substring | Hard |
| 77 | 组合 | Combinations | Medium |
| 78 | 子集 | Subsets | Medium |
| 79 | 单词搜索 | Word Search | Medium |
| 80 | 删除排序数组中的重复项 II | Remove Duplicates from Sorted Array II | Medium |
| 81 | 搜索旋转排序数组 II | Search in Rotated Sorted Array II | Medium |
| 82 | 删除排序链表中的重复元素 II | Remove Duplicates from Sorted List II | Medium |
| 83 | 删除排序链表中的重复元素 | Remove Duplicates from Sorted List | Easy |
| 84 | 柱状图中最大的矩形 | Largest Rectangle in Histogram | Hard |
| 85 | 最大矩形 | Maximal Rectangle | Hard |
| 86 | 分隔链表 | Partition List | Medium |
| 87 | 扰乱字符串 | Scramble String | Hard |
| 88 | 合并两个有序数组 | Merge Sorted Array | Easy |
| 89 | 格雷编码 | Gray Code | Medium |
| 90 | 子集 II | Subsets II | Medium |
| 91 | 解码方法 | Decode Ways | Medium |
| 92 | 反转链表 II | Reverse Linked List II | Medium |
| 93 | 复原IP地址 | Restore IP Addresses | Medium |
| 94 | 二叉树的中序遍历 | Binary Tree Inorder Traversal | Medium |
| 95 | 不同的二叉搜索树 II | Unique Binary Search Trees II | Medium |
| 96 | 不同的二叉搜索树 | Unique Binary Search Trees | Medium |
| 97 | 交错字符串 | Interleaving String | Medium |
| 98 | 验证二叉搜索树 | Validate Binary Search Tree | Medium |
| 99 | 恢复二叉搜索树 | Recover Binary Search Tree | Medium |
| 100 | 相同的树 | Same Tree | Hard |
| 101 | 对称二叉树 | Symmetric Tree | Easy |
| 102 | 二叉树的层次遍历 | Binary Tree Level Order Traversal | Medium |
| 103 | 二叉树的锯齿形层次遍历 | Binary Tree Zigzag Level Order Traversal | Medium |
| 104 | 二叉树的最大深度 | Maximum Depth of Binary Tree | Easy |
| 105 | 从前序与中序遍历序列构造二叉树 | Construct Binary Tree from Preorder and Inorder Traversal | Medium |
| 106 | 从中序与后序遍历序列构造二叉树 | Construct Binary Tree from Inorder and Postorder Traversal | Medium |
| 107 | 二叉树的层次遍历 II | Binary Tree Level Order Traversal II | Easy |
| 108 | 将有序数组转换为二叉搜索树 | Convert Sorted Array to Binary Search Tree | Easy |
| 109 | 有序链表转换二叉搜索树 | Convert Sorted List to Binary Search Tree | Medium |
| 110 | 平衡二叉树 | Balanced Binary Tree | Easy |
| 111 | 二叉树的最小深度 | Minimum Depth of Binary Tree | Easy |
| 112 | 路径总和 | Path Sum | Easy |
| 113 | 路径总和 II | Path Sum II | Medium |
| 114 | 二叉树展开为链表 | Flatten Binary Tree to Linked List | Medium |
| 115 | 不同的子序列 | Distinct Subsequences | Hard |
| 116 | 填充同一层的兄弟节点 | Populating Next Right Pointers in Each Node | Medium |
| 117 | 填充同一层的兄弟节点 II | Populating Next Right Pointers in Each Node II | Medium |
| 118 | 杨辉三角 | Pascal's Triangle | Easy |
| 119 | 杨辉三角 II | Pascal's Triangle II | Easy |
| 120 | 三角形最小路径和 | Triangle | Medium |
| 121 | 买卖股票的最佳时机 I | Best Time to Buy and Sell Stock | Easy |
| 122 | 买卖股票的最佳时机 II | Best Time to Buy and Sell Stock II | Easy |
| 123 | 买卖股票的最佳时机 III | Best Time to Buy and Sell Stock III | Hard |
| 124 | 二叉树中的最大路径和 | Binary Tree Maximum Path Sum | Hard |
| 125 | 验证回文串 | Valid Palindrome | Easy |
| 126 | 单词接龙 II | Word Ladder II | Hard |
| 127 | 单词接龙 | Word Ladder | Medium |
| 128 | 最长连续序列 | Longest Consecutive Sequence | Hard |
| 129 | 求根到叶子节点数字之和 | Sum Root to Leaf Numbers | Medium |
| 130 | 被围绕的区域 | Surrounded Regions | Medium |
| 131 | 分割回文串 | Palindrome Partitioning | Medium |
| 132 | 分割回文串 II | Palindrome Partitioning II | Hard |
| 133 | 克隆图 | Clone Graph | Medium |
| 134 | 加油站 | Gas Station | Medium |
| 135 | 分发糖果 | Candy | Hard |
| 136 | 只出现一次的数字 | Single Number | Easy |
| 137 | 只出现一次的数字 II | Single Number II | Medium |
| 138 | 复制带随机指针的链表 | Copy List with Random Pointer | Medium |
| 139 | 单词拆分 | Word Break | Medium |
| 140 | 单词拆分 II | Word Break II | Hard |
| 141 | 环形链表 | Linked List Cycle | Easy |
| 142 | 环形链表 II | Linked List Cycle II | Medium |
| 143 | 重排链表 | Reorder List | Medium |
| 144 | 二叉树的前序遍历 | Binary Tree Preorder Traversal | Medium |
| 145 | 二叉树的后序遍历 | Binary Tree Postorder Traversal | Hard |
| 146 | LRU缓存机制 | LRU Cache | Hard |
| 147 | 对链表进行插入排序 | Insertion Sort List | Medium |
| 148 | 排序链表 | Sort List | Medium |
| 149 | 直线上最多的点数 | Max Points on a Line | Hard |
| 150 | 逆波兰表达式求值 | Evaluate Reverse Polish Notation | Medium |
| 151 | 翻转字符串里的单词 | Reverse Words in a String | Medium |
| 152 | 乘积最大子序列 | Maximum Product Subarray | Medium |
| 153 | 寻找旋转排序数组中的最小值 | Find Minimum in Rotated Sorted Array | Medium |
| 154 | 寻找旋转排序数组中的最小值 II | Find Minimum in Rotated Sorted Array II | Hard |
| 155 | 最小栈 | Min Stack | Easy |
| 156 | 二叉树的上下颠倒 $ Binary Tree Upside Down | Medium |
| 157 | 用Read4来读取N个字符 $ Read N Characters Given Read4 | Easy |
| 158 | 用Read4来读取N个字符II $ Read N Characters Given Read4 II | Hard |
| 159 | 具有最多两个不同字符的最长子串 $ Longest Substring with At Most Two Distinct Characters | Hard |
| 160 | 相交链表 | Intersection of Two Linked Lists | Easy |
| 161 | 一次编辑距离 $ One Edit Distance | Medium |
| 162 | 寻找峰值 | Find Peak Element | Medium |
| 163 | 缺失区间 $ Missing Ranges | Medium |
| 164 | 最大间距 | Maximum Gap | Hard |
| 165 | 比较版本号 | Compare Version Numbers | Medium |
| 166 | 分数到小数 | Fraction to Recurring Decimal | Medium |
| 167 | 两数之和 II - 输入有序数组 | Two Sum II - Input array is sorted | Easy |
| 168 | Excel表列名称 | Excel Sheet Column Title | Easy |
| 169 | 求众数 | Majority Element | Easy |
| 170 | 两数之和之三 - 数据结构设计 $ Two Sum III - Data structure design | Easy |
| 171 | Excel表列序号 | Excel Sheet Column Number | Easy |
| 172 | 阶乘后的零 | Factorial Trailing Zeroes | Easy |
| 173 | 二叉搜索树迭代器 | Binary Search Tree Iterator | Medium |
| 174 | 地下城游戏 | Dungeon Game | Hard |
| 175 | 组合两个表 | Combine Two Tables | Easy |
| 176 | 第二高的薪水 | Second Highest Salary | Easy |
| 177 | 第N高的薪水 | Nth Highest Salary | Medium |
| 178 | 分数排名 | Rank Scores | Medium |
| 179 | 最大数 | Largest Number | Medium |
| 180 | 连续出现的数字 | Consecutive Numbers | Medium |
| 181 | 超过经理收入的员工 | Employees Earning More Than Their Managers | Easy |
| 182 | 查找重复的电子邮箱 | Duplicate Emails | Easy |
| 183 | 从不订购的客户 | Customers Who Never Order | Easy |
| 184 | 部门工资最高的员工 | Department Highest Salary | Medium |
| 185 | 部门工资前三高的员工 | Department Top Three Salaries | Hard |
| 186 | 翻转字符串中的单词 II $ Reverse Words in a String II | Medium |
| 187 | 重复的DNA序列 | Repeated DNA Sequences | Medium |
| 188 | 买卖股票的最佳时机 IV | Best Time to Buy and Sell Stock IV | Hard |
| 189 | 旋转数组 | Rotate Array | Easy |
| 190 | 颠倒二进制位 | Reverse Bits | Easy |
| 191 | 位1的个数 | Number of 1 Bits | Easy |
| 192 | 统计词频 | Word Frequency | Medium |
| 193 | 有效电话号码 | Valid Phone Numbers | Easy |
| 194 | 转置文件 | Transpose File | Medium |
| 195 | 第十行 | Tenth Line | Easy |
| 196 | 删除重复的电子邮箱 | Delete Duplicate Emails | Easy |
| 197 | 上升的温度 | Rising Temperature | Easy |
| 198 | 打家劫舍 | House Robber | Easy |
| 199 | 二叉树的右视图 | Binary Tree Right Side View | Medium |
| 200 | 岛屿的个数 | Number of Islands | Medium |
| 201 | 数字范围按位与 | Bitwise AND of Numbers Range | Medium |
| 202 | 快乐数 | Happy Number | Easy |
| 203 | 移除链表元素 | Remove Linked List Elements |
Easy |
| 204 | 计数质数 | Count Primes |
Easy |
| 205 | 同构字符串 | Isomorphic Strings |
Easy |
| 206 | 反转链表 | Reverse Linked List | Easy |
| 207 | 课程表 | Course Schedule | Medium |
| 208 | 实现 Trie (前缀树) | Implement Trie (Prefix Tree) | Medium |
| 209 | 长度最小的子数组 | Minimum Size Subarray Sum | Medium |
| 210 | 课程表 II | Course Schedule II | Medium |
| 211 | 添加与搜索单词 - 数据结构设计 | Add and Search Word - Data structure design | Medium |
| 212 | 单词搜索 II | Word Search II | Hard |
| 213 | 打家劫舍 II | House Robber II | Medium |
| 214 | 最短回文串 | Shortest Palindrome | Hard |
| 215 | 数组中的第K个最大元素 | Kth Largest Element in an Array | Medium |
| 216 | 组合总和 III | Combination Sum III | Medium |
| 217 | 存在重复元素 | Contains Duplicate | Easy |
| 218 | 天际线问题 | The Skyline Problem | Hard |
| 219 | 存在重复元素 II | Contains Duplicate II | Easy |
| 220 | 存在重复元素 III | Contains Duplicate III | Medium |
| 221 | 最大正方形 | Maximal Square | Medium |
| 222 | 完全二叉树的节点个数 | Count Complete Tree Nodes | Medium |
| 223 | 矩形面积 | Rectangle Area | Medium |
| 224 | 基本计算器 | Basic Calculator | Hard |
| 225 | 用队列实现栈 | Implement Stack using Queues | Easy |
| 226 | 翻转二叉树 | Invert Binary Tree | Easy |
| 227 | 基本计算器 II | Basic Calculator II | Medium |
| 228 | 汇总区间 | Summary Ranges | Medium |
| 229 | 求众数 II | Majority Element II | Medium |
| 230 | 二叉搜索树中第K小的元素 | Kth Smallest Element in a BST | Medium |
| 231 | 2的幂 | Power of Two | Easy |
| 232 | 用栈实现队列 | Implement Queue using Stacks | Easy |
| 233 | 数字1的个数 | Number of Digit One | Hard |
| 234 | 回文链表 | Palindrome Linked List | Easy |
| 235 | 二叉搜索树的最近公共祖先 | Lowest Common Ancestor of a Binary Search Tree | Easy |
| 236 | 二叉树的最近公共祖先 | Lowest Common Ancestor of a Binary Tree | Medium |
| 237 | 删除链表中的节点 | Delete Node in a Linked List | Easy |
| 238 | 除自身以外数组的乘积 | Product of Array Except Self | Medium |
| 239 | 滑动窗口最大值 | Sliding Window Maximum | Hard |
| 240 | 搜索二维矩阵 II | Search a 2D Matrix II | Medium |
| 241 | 为运算表达式设计优先级 | Different Ways to Add Parentheses | Medium |
| 242 | 有效的字母异位词 | Valid Anagram | Easy |
| 243 | 最短单词距离 $ Shortest Word Distance | Easy |
| 244 | 最短单词距离 II $ Shortest Word Distance II | Medium |
| 245 | 最短单词距离 III $ Shortest Word Distance III | Medium |
| 246 | 对称数 $ Strobogrammatic Number | Easy |
| 247 | 对称数 II $ Strobogrammatic Number II |
Medium |
| 248 | 对称数 III $ Strobogrammatic Number III |
Hard |
| 249 | 群组偏移字符串 $ Group Shifted Strings | Medium |
| 250 | 计数相同值子树的个数 $ Count Univalue Subtrees | Medium |
| 251 | 展平二维向量 $ Flatten 2D Vector |
Medium |
| 252 | 会议室 $ Meeting Rooms | Easy |
| 253 | 会议室 II $ Meeting Rooms II |
Medium |
| 254 | 因子组合 $ Factor Combinations |
Medium |
| 255 | 验证二叉搜索树的先序序列 $ Verify Preorder Sequence in Binary Search Tree |
Medium |
| 256 | 粉刷房子 $ Paint House |
Easy |
| 257 | 二叉树的所有路径 | Binary Tree Paths | Easy |
| 258 | 各位相加 | Add Digits |
Easy |
| 259 | 三数之和较小值 $ 3Sum Smaller |
Medium |
| 260 | 只出现一次的数字 III | Single Number III | Medium |
| 261 | 图验证树 $ Graph Valid Tree |
Medium |
| 262 | 行程和用户 | Trips and Users |
Hard |
| 263 | 丑数 | Ugly Number | Easy |
| 264 | 丑数 II | Ugly Number II |
Medium |
| 265 | 粉刷房子 II $ Paint House II |
Hard |
| 266 | 回文全排列 $ Palindrome Permutation |
Easy |
| 267 | 回文全排列 II $ Palindrome Permutation II | Medium |
| 268 | 缺失数字 | Missing Number | Easy |
| 269 | 外星人词典 $ Alien Dictionary | Hard |
| 270 | 最近的二分搜索树的值 $ Closest Binary Search Tree Value |
Easy |
| 271 | 加码解码字符串 $ Encode and Decode Strings |
Medium |
| 272 | 最近的二分搜索树的值 II $ Closest Binary Search Tree Value II | Hard |
| 273 | 整数转换英文表示 | Integer to English Words | Hard |
| 274 | H指数 | H-Index | Medium |
| 275 | H指数 II | H-Index II |
Medium |
| 276 | 粉刷栅栏 $ Paint Fence |
Easy |
| 277 | 寻找名人 $ Find the Celebrity |
Medium |
| 278 | 第一个错误的版本 | First Bad Version | Easy |
| 279 | 完全平方数 | Perfect Squares |
Medium |
| 280 | 摆动排序 $ Wiggle Sort |
Medium |
| 281 | 之字形迭代器 $ Zigzag Iterator |
Medium |
| 282 | 给表达式添加运算符 | Expression Add Operators |
Hard |
| 283 | 移动零 | Move Zeroes |
Easy |
| 284 | 顶端迭代器 | Peeking Iterator |
Medium |
| 285 | 二叉搜索树中的中序后继节点 $ Inorder Successor in BST |
Medium |
| 286 | 墙和门 $ Walls and Gates | Medium |
| 287 | 寻找重复数 | Find the Duplicate Number |
Medium |
| 288 | 唯一单词缩写 $ Unique Word Abbreviation |
Medium |
| 289 | 生命游戏 | Game of Life |
Medium |
| 290 | 单词模式 | Word Pattern | Easy |
| 291 | 单词模式 II $ Word Pattern II | Hard |
| 292 | Nim游戏 | Nim Game |
Easy |
| 293 | 翻转游戏 $ Flip Game | Easy |
| 294 | 翻转游戏之 II $ Flip Game II |
Medium |
| 295 | 数据流的中位数 | Find Median from Data Stream |
Hard |
| 296 | 最佳开会地点 $ Best Meeting Point | Hard |
| 297 | 二叉树的序列化与反序列化 | Serialize and Deserialize Binary Tree |
Hard |
| 298 | 二叉树最长连续序列 $ Binary Tree Longest Consecutive Sequence |
Medium |
| 299 | 猜数字游戏 | Bulls and Cows | Medium |
| 300 | 最长上升子序列 | Longest Increasing Subsequence | Medium |
| 301 | 删除无效的括号 | Remove Invalid Parentheses | Hard |
| 302 | 包含黑色像素的最小矩形 $ Smallest Rectangle Enclosing Black Pixels |
Hard |
| 303 | 区域和检索 - 数组不可变 | Range Sum Query - Immutable | Easy |
| 304 | 二维区域和检索 - 矩阵不可变 | Range Sum Query 2D - Immutable | Medium |
| 305 | 岛屿的个数 II $ Number of Islands II | Hard |
| 306 | 累加数 | Additive Number |
Medium |
| 307 | 区域和检索 - 数组可修改 | Range Sum Query - Mutable |
Medium |
| 308 | 二维区域和检索 - 可变 $ Range Sum Query 2D - Mutable |
Hard |
| 309 | 最佳买卖股票时机含冷冻期 | Best Time to Buy and Sell Stock with Cooldown | Medium |
| 310 | 最小高度树 | Minimum Height Trees | Medium |
| 311 | 稀疏矩阵相乘 $ Sparse Matrix Multiplication | Medium |
| 312 | 戳气球 | Burst Balloons |
Hard |
| 313 | 超级丑数 | Super Ugly Number |
Medium |
| 314 | 二叉树的竖直遍历 $ Binary Tree Vertical Order Traversal | Medium |
| 315 | 计算右侧小于当前元素的个数 | Count of Smaller Numbers After Self |
Hard |
| 316 | 去除重复字母 | Remove Duplicate Letters | Hard |
| 317 | 建筑物的最短距离 $ Shortest Distance from All Buildings |
Hard |
| 318 | 最大单词长度乘积 | Maximum Product of Word Lengths | Medium |
| 319 | 灯泡开关 | Bulb Switcher | Medium |
| 320 | 通用简写 $ Generalized Abbreviation | Medium |
| 321 | 拼接最大数 | Create Maximum Number | Hard |
| 322 | 零钱兑换 | Coin Change |
Medium |
| 323 | 无向图中的连通区域的个数 $ Number of Connected Components in an Undirected Graph |
Medium |
| 324 | 摆动排序 II | Wiggle Sort II | Medium |
| 325 | 最大子数组之和为k $ Maximum Size Subarray Sum Equals k | Medium |
| 326 | 3的幂 | Power of Three | Easy |
| 327 | 区间和的个数 | Count of Range Sum | Hard |
| 328 | 奇偶链表 | Odd Even Linked List |
Medium |
| 329 | 矩阵中的最长递增路径 | Longest Increasing Path in a Matrix |
Hard |
| 330 | 按要求补齐数组 | Patching Array |
Hard |
| 331 | 验证二叉树的前序序列化 | Verify Preorder Serialization of a Binary Tree | Medium |
| 332 | 重新安排行程 | Reconstruct Itinerary | Medium |
| 333 | 最大的二分搜索子树 $ Largest BST Subtree | Medium |
| 334 | 递增的三元子序列 | Increasing Triplet Subsequence | Medium |
| 335 | 路径交叉 | Self Crossing | Hard |
| 336 | 回文对 | Palindrome Pairs | Hard |
| 337 | 打家劫舍 III | House Robber III | Medium |
| 338 | 比特位计数 | Counting Bits | Medium |
| 339 | 嵌套链表权重和 $ Nested List Weight Sum |
Easy |
| 340 | 最多有K个不同字符的最长子串 $ Longest Substring with At Most K Distinct Characters |
Hard |
| 341 | 压平嵌套链表迭代器 | Flatten Nested List Iterator |
Medium |
| 342 | 4的幂 | Power of Four | Easy |
| 343 | 整数拆分 | Integer Break | Medium |
| 344 | 反转字符串 | Reverse String |
Easy |
| 345 | 反转字符串中的元音字母 | Reverse Vowels of a String | Easy |
| 346 | 从数据流中移动平均值 $ Moving Average from Data Stream | Easy |
| 347 | 前K个高频元素 | Top K Frequent Elements |
Medium |
| 348 | 设计井字棋游戏 $ Design Tic-Tac-Toe |
Medium |
| 349 | 两个数组的交集 | Intersection of Two Arrays | Easy |
| 350 | 两个数组的交集 II | Intersection of Two Arrays II |
Easy |
| 351 | 安卓解锁模式 $ Android Unlock Patterns | Medium |
| 352 | 将数据流变为多个不相交间隔 | Data Stream as Disjoint Intervals | Hard |
| 353 | Medium | |
| 354 | 俄罗斯套娃信封问题 | Russian Doll Envelopes | Hard |
| 355 | Medium | |
| 356 | Medium | |
| 357 | 计算各个位数不同的数字个数 | Count Numbers with Unique Digits | Medium |
| 358 | Hard | |
| 359 | Easy | |
| 360 | Medium | |
| 361 | Medium | |
| 362 | Medium | |
| 363 | 矩形区域不超过 K 的最大数值和 | Max Sum of Rectangle No Larger Than K | Hard |
| 364 | Medium | |
| 365 | 水壶问题 | Water and Jug Problem | Medium |
| 366 | Medium | |
| 367 | 有效的完全平方数 | Valid Perfect Square | Easy |
| 368 | 最大整除子集 | Largest Divisible Subset |
Medium |
| 369 | Medium | |
| 370 | Medium | |
| 371 | 两整数之和 | Sum of Two Integers | Easy |
| 372 | 超级次方 | Super Pow |
Medium |
| 373 | 查找和最小的K对数字 | Find K Pairs with Smallest Sums |
Medium |
| 374 | 猜数字大小 | Guess Number Higher or Lower | Easy |
| 375 | 猜数字大小 II | Guess Number Higher or Lower II | Medium |
| 376 | 摆动序列 | Wiggle Subsequence | Medium |
| 377 | 组合总和 Ⅳ | Combination Sum IV | Medium |
| 378 | 有序矩阵中第K小的元素 | Kth Smallest Element in a Sorted Matrix |
Medium |
| 379 | Medium | |
| 380 | 常数时间插入、删除和获取随机元素 | Insert Delete GetRandom O(1) |
Medium |
| 381 | O(1) 时间插入、删除和获取随机元素 - 允许重复 | Insert Delete GetRandom O(1) - Duplicates allowed | Hard |
| 382 | 链表随机节点 | Linked List Random Node |
Medium |
| 383 | 赎金信 | Ransom Note | Easy |
| 384 | 打乱数组 | Shuffle an Array | Medium |
| 385 | 迷你语法分析器 | Mini Parser | Medium |
| 386 | 字典序排数 | Lexicographical Numbers | Medium |
| 387 | 字符串中的第一个唯一字符 | First Unique Character in a String | Easy |
| 388 | 文件的最长绝对路径 | Longest Absolute File Path | Medium |
| 389 | 找不同 | Find the Difference | Easy |
| 390 | 消除游戏 | Elimination Game | Medium |
| 391 | 完美矩形 | Perfect Rectangle | Hard |
| 392 | 判断子序列 | Is Subsequence | Medium |
| 393 | UTF-8 编码验证 | UTF-8 Validation | Medium |
| 394 | 字符串解码 | Decode String | Medium |
| 395 | 至少有K个重复字符的最长子串 | Longest Substring with At Least K Repeating Characters | Medium |
| 396 | 旋转函数 | Rotate Function | Medium |
| 397 | 整数替换 | Integer Replacement | Medium |
| 398 | 随机数索引 | Random Pick Index | Medium |
| 399 | 除法求值 | Evaluate Division | Medium |
| 400 | 第N个数字 | Nth Digit | Easy |
| 401 | 二进制手表 | Binary Watch | Easy |
| 402 | 移掉K位数字 | Remove K Digits | Medium |
| 403 | 青蛙过河 | Frog Jump | Hard |
| 404 | 左叶子之和 | Sum of Left Leaves | Easy |
| 405 | 数字转换为十六进制数 | Convert a Number to Hexadecimal | Easy |
| 406 | 根据身高重建队列 | Queue Reconstruction by Height | Medium |
| 407 | 接雨水 II | Trapping Rain Water II | Hard |
| 408 | Easy | |
| 409 | 最长回文串 | Longest Palindrome | Easy |
| 410 | 分割数组的最大值 | Split Array Largest Sum | Hard |
| 411 | Hard | |
| 412 | Fizz Buzz | Easy |
| 413 | 等差数列划分 | Arithmetic Slices | Medium |
| 414 | 第三大的数 | Third Maximum Number | Easy |
| 415 | 字符串相加 | Add Strings | Easy |
| 416 | 分割等和子集 | Partition Equal Subset Sum | Medium |
| 417 | 太平洋大西洋水流问题 | Pacific Atlantic Water Flow | Medium |
| 418 | Medium | |
| 419 | 甲板上的战舰 | Battleships in a Board | Medium |
| 420 | 强密码检验器 | Strong Password Checker | Hard |
| 421 | 数组中两个数的最大异或值 | Maximum XOR of Two Numbers in an Array | Medium |
| 422 | Easy | |
| 423 | 从英文中重建数字 | Reconstruct Original Digits from English | Medium |
| 424 | 替换后的最长重复字符 | Longest Repeating Character Replacement | Medium |
| 425 | Hard | |
| 426 | Medium | |
| 427 | Easy | |
| 428 | Hard | |
| 429 | Easy | |
| 430 | Medium | |
| 431 | Hard | |
| 432 | 全 O(1) 的数据结构 | All O`one Data Structure | Hard |
| 433 | 最小基因变化 | Minimum Genetic Mutation | Medium |
| 434 | 字符串中的单词数 | Number of Segments in a String | Easy |
| 435 | 无重叠区间 | Non-overlapping Intervals | Medium |
| 436 | 寻找右区间 | Find Right Interval | Medium |
| 437 | 路径总和 III | Path Sum III | Easy |
| 438 | 找到字符串中所有字母异位词 | Find All Anagrams in a String | Easy |
| 439 | Medium | |
| 440 | 字典序的第K小数字 | K-th Smallest in Lexicographical Order | Hard |
| 441 | 排列硬币 | Arranging Coins | Easy |
| 442 | 数组中重复的数据 | Find All Duplicates in an Array | Medium |
| 443 | 压缩字符串 | String Compression | Easy |
| 444 | Medium | |
| 445 | 两数相加 II | Add Two Numbers II | Medium |
| 446 | 等差数列划分 II - 子序列 | Arithmetic Slices II - Subsequence | Hard |
| 447 | 回旋镖的数量 | Number of Boomerangs | Easy |
| 448 | 找到所有数组中消失的数字 | Find All Numbers Disappeared in an Array | Easy |
| 449 | Medium | |
| 450 | 删除二叉搜索树中的节点 | Delete Node in a BST | Medium |
| 451 | 根据字符出现频率排序 | Sort Characters By Frequency | Medium |
| 452 | 用最少数量的箭引爆气球 | Minimum Number of Arrows to Burst Balloons | Medium |
| 453 | 最小移动次数使数组元素相等 | Minimum Moves to Equal Array Elements | Easy |
| 454 | 四数相加 II | 4Sum II | Medium |
| 455 | 分发饼干 | Assign Cookies | Easy |
| 456 | 132模式 | 132 Pattern |
Medium |
| 457 | 环形数组循环 | Circular Array Loop | Medium |
| 458 | 可怜的小猪 | Poor Pigs | Hard |
| 459 | 重复的子字符串 | Repeated Substring Pattern | Easy |
| 460 | LFU缓存 | LFU Cache |
Hard |
| 461 | 汉明距离 | Hamming Distance | Easy |
| 462 | 最少移动次数使数组元素相等 II | Minimum Moves to Equal Array Elements II | Medium |
| 463 | 岛屿的周长 | Island Perimeter | Easy |
| 464 | 我能赢吗 | Can I Win | Medium |
| 465 | Hard | |
| 466 | 统计重复个数 | Count The Repetitions | Hard |
| 467 | 环绕字符串中唯一的子字符串 | Unique Substrings in Wraparound String | Medium |
| 468 | 验证IP地址 | Validate IP Address | Medium |
| 469 | Medium | |
| 470 | 用 Rand7() 实现 Rand10() | Implement Rand10() Using Rand7() | Medium |
| 471 | Hard | |
| 472 | 连接词 | Concatenated Words | Hard |
| 473 | 火柴拼正方形 | Matchsticks to Square | Medium |
| 474 | 一和零 | Ones and Zeroes | Medium |
| 475 | 供暖器 | Heaters | Easy |
| 476 | 数字的补数 | Number Complement | Easy |
| 477 | 汉明距离总和 | Total Hamming Distance | Medium |
| 478 | 在圆内随机生成点 | Generate Random Point in a Circle | Medium |
| 479 | 最大回文数乘积 | Largest Palindrome Product | Hard |
| 480 | 滑动窗口中位数 | Sliding Window Median |
Hard |
| 481 | 神奇字符串 | Magical String | Medium |
| 482 | 密钥格式化 | License Key Formatting | Easy |
| 483 | 最小好进制 | Smallest Good Base | Hard |
| 484 | Medium | |
| 485 | 最大连续1的个数 | Max Consecutive Ones | Easy |
| 486 | 预测赢家 | Predict the Winner | Medium |
| 487 | Medium | |
| 488 | 祖玛游戏 | Zuma Game | Hard |
| 489 | Hard | |
| 490 | Medium | |
| 491 | 递增子序列 | Increasing Subsequences | Medium |
| 492 | 构造矩形 | Construct the Rectangle | Easy |
| 493 | 翻转对 | Reverse Pairs | Hard |
| 494 | 目标和 | Target Sum | Medium |
| 495 | 提莫攻击 | Teemo Attacking | Medium |
| 496 | 下一个更大元素 I | Next Greater Element I | Easy |
| 497 | 非重叠矩形中的随机点 | Random Point in Non-overlapping Rectangles | Medium |
| 498 | 对角线遍历 | Diagonal Traverse | Medium |
| 499 | Hard | |
| 500 | 键盘行 | Keyboard Row | Easy |
| 501 | 二叉搜索树中的众数 | Find Mode in Binary Search Tree | Easy |
| 502 | IPO(首次公开募股) | Initial Public Offerings | Hard |
| 503 | 下一个更大元素 II | Next Greater Element II | Medium |
| 504 | 七进制数 | Base 7 | Easy |
| 505 | Medium | |
| 506 | 相对名次 | Relative Ranks | Easy |
| 507 | 完美数 | Perfect Number | Easy |
| 508 | 出现次数最多的子树元素和 | Most Frequent Subtree Sum | Medium |
| 509 | 斐波那契数 | Fibonacci Number | Easy |
| 510 | Medium | |
| 511 | Medium | |
| 512 | Medium | |
| 513 | 找树左下角的值 | Find Bottom Left Tree Value | Medium |
| 514 | 自由之路 | Freedom Trail | Hard |
| 515 | 在每个树行中找最大值 | Find Largest Value in Each Tree Row | Medium |
| 516 | 最长回文子序列 | Longest Palindromic | Medium |
| 517 | 超级洗衣机 | Super Washing Machines | Hard |
| 518 | 零钱兑换 II | Coin Change 2 | Medium |
| 519 | 随机翻转矩阵 | Random Flip Matrix | Medium |
| 520 | 检测大写字母 | Detect Capital | Easy |
| 521 | 最长特殊序列 Ⅰ | Longest Uncommon Subsequence I | Easy |
| 522 | 最长特殊序列 II | Longest Uncommon Subsequence II | Medium |
| 523 | 连续的子数组和 | Continuous Subarray Sum | Medium |
| 524 | 通过删除字母匹配到字典里最长单词 | Longest Word in Dictionary through Deleting | Medium |
| 525 | 连续数组 | Contiguous Array | Medium |
| 526 | 优美的排列 | Beautiful Arrangement |
Medium |
| 527 | Hard | |
| 528 | 按权重随机选择 | Random Pick with Weight | Medium |
| 529 | 扫雷游戏 | Minesweeper | Medium |
| 530 | 二叉搜索树的最小绝对差 | Minimum Absolute Difference in BST | Easy |
| 531 | Medium | |
| 532 | 数组中的K-diff数对 | K-diff Pairs in an Array | Easy |
| 533 | Medium | |
| 534 | Medium | |
| 535 | Medium | |
| 536 | Medium | |
| 537 | 复数乘法 | Complex Number Multiplication |
Medium |
| 538 | 把二叉搜索树转换为累加树 | Convert BST to Greater Tree | Easy |
| 539 | 最小时间差 | Minimum Time Difference | Medium |
| 540 | 有序数组中的单一元素 | Single Element in a Sorted Array |
Medium |
| 541 | 反转字符串 II | Reverse String II | Easy |
| 542 | 01 矩阵 | 01 Matrix | Medium |
| 543 | 二叉树的直径 | Diameter of Binary Tree | Easy |
| 544 | Medium | |
| 545 | Medium | |
| 546 | 移除盒子 | Remove Boxes |
Hard |
| 547 | 朋友圈 | Friend Circles |
Medium |
| 548 | Medium | |
| 549 | Medium | |
| 550 | Medium | |
| 551 | 学生出勤纪录 I | Student Attendance Record I | Easy |
| 552 | 学生出勤记录 II | Student Attendance Record II | Hard |
| 553 | 最优除法 | Optimal Division | Medium |
| 554 | 砖墙 | Brick Wall | Medium |
| 555 | Medium | |
| 556 | 下一个更大元素 III | Next Greater Element III | Medium |
| 557 | 反转字符串中的单词 III | Reverse Words in a String III | Easy |
| 558 | Easy | |
| 559 | Easy | |
| 560 | 和为K的子数组 | Subarray Sum Equals K | Medium |
| 561 | 数组拆分 I | Array Partition I | Easy |
| 562 | Medium | |
| 563 | 二叉树的坡度 | Binary Tree Tilt | Easy |
| 564 | 寻找最近的回文数 | Find the Closest Palindrome | Hard |
| 565 | 数组嵌套 | Array Nesting |
Medium |
| 566 | 重塑矩阵 | Reshape the Matrix | Easy |
| 567 | 字符串的排列 | Permutation in String |
Medium |
| 568 | Hard | |
| 569 | Hard | |
| 570 | Medium | |
| 571 | Hard | |
| 572 | 另一个树的子树 | Subtree of Another Tree | Easy |
| 573 | Medium | |
| 574 | Medium | |
| 575 | 分糖果 | Distribute Candies | Easy |
| 576 | 出界的路径数 | Out of Boundary Paths | Medium |
| 577 | 员工奖金 | Employee Bonus | Easy |
| 578 | Medium | |
| 579 | Hard | |
| 580 | Medium | |
| 581 | Easy | |
| 582 | Medium | |
| 583 | 两个字符串的删除操作 | Delete Operation for Two Strings | Medium |
| 584 | Easy | |
| 585 | Medium | |
| 586 | Easy | |
| 587 | 安装栅栏 | Erect the Fence | Hard |
| 588 | Hard | |
| 589 | Easy | |
| 590 | Easy | |
| 591 | 标签验证器 | Tag Validator |
Hard |
| 592 | 分数加减运算 | Fraction Addition and Subtraction |
Medium |
| 593 | 有效的正方形 | Valid Square |
Medium |
| 594 | 最长和谐子序列 | Longest Harmonious Subsequence | Easy |
| 595 | 大的国家 | Big Countries |
Easy |
| 596 | 超过5名学生的课 | Classes More Than 5 Students |
Easy |
| 597 | Easy | |
| 598 | 范围求和 II | Range Addition II |
Easy |
| 599 | 两个列表的最小索引总和 | Minimum Index Sum of Two Lists | Easy |
| 600 | 不含连续1的非负整数 | Non-negative Integers without Consecutive Ones | Hard |
| 601 | 体育馆的人流量 | Human Traffic of Stadium | Hard |
| 602 | Medium | |
| 603 | Easy | |
| 604 | Easy | |
| 605 | 种花问题 | Can Place Flowers | Easy |
| 606 | 根据二叉树创建字符串 | Construct String from Binary Tree |
Easy |
| 607 | Easy | |
| 608 | Medium | |
| 609 | 在系统中查找重复文件 | Find Duplicate File in System |
Medium |
| 610 | Easy | |
| 611 | 有效三角形的个数 | Valid Triangle Number | Medium |
| 612 | Medium | |
| 613 | Easy | |
| 614 | Medium | |
| 615 | Hard | |
| 616 | Medium | |
| 617 | 合并二叉树 | Merge Two Binary Trees |
Easy |
| 618 | Hard | |
| 619 | Easy | |
| 620 | 有趣的电影 | Not Boring Movies |
Easy |
| 621 | 任务调度器 | Task Scheduler | Medium |
| 622 | 设计循环队列 | Design Circular Queue |
Medium |
| 623 | 在二叉树中增加一行 | Add One Row to Tree |
Medium |
| 624 | Easy | |
| 625 | Medium | |
| 626 | 换座位 | Exchange Seats |
Medium |
| 627 | 交换工资 | Swap Salary |
Easy |
| 628 | 三个数的最大乘积 | Maximum Product of Three Numbers |
Easy |
| 629 | K个逆序对数组 | K Inverse Pairs Array |
Hard |
| 630 | 课程表 III | Course Schedule III |
Hard |
| 631 | Hard | |
| 632 | 最小区间 | Smallest Range |
Hard |
| 633 | 平方数之和 | Sum of Square Numbers |
Easy |
| 634 | Medium | |
| 635 | Medium | |
| 636 | 函数的独占时间 | Exclusive Time of Functions |
Medium |
| 637 | 二叉树的层平均值 | Average of Levels in Binary Tree | Easy |
| 638 | 大礼包 | Shopping Offers | Medium |
| 639 | 解码方法 2 | Decode Ways II | Hard |
| 640 | 求解方程 | Solve the Equation | Medium |
| 641 | 设计循环双端队列 | Design Circular Deque |
Medium |
| 642 | Hard | |
| 643 | 子数组最大平均数 I | Maximum Average Subarray I | Easy |
| 644 | Hard | |
| 645 | 错误的集合 | Set Mismatch |
Easy |
| 646 | 最长数对链 | Maximum Length of Pair Chain |
Medium |
| 647 | 回文子串 | Palindromic Substrings |
Medium |
| 648 | 单词替换 | Replace Words |
Medium |
| 649 | Dota2 参议院 | Dota2 Senate |
Medium |
| 650 | 只有两个键的键盘 | 2 Keys Keyboard |
Medium |
| 651 | Medium | |
| 652 | 寻找重复的子树 | Find Duplicate Subtrees | Medium |
| 653 | 两数之和 IV - 输入 BST | Two Sum IV - Input is a BST | Easy |
| 654 | 最大二叉树 | Maximum Binary Tree | Medium |
| 655 | 输出二叉树 | Print Binary Tree | Medium |
| 656 | Hard | |
| 657 | 机器人能否返回原点 | Robot Return to Origin |
Easy |
| 658 | 找到 K 个最接近的元素 | Find K Closest Elements | Medium |
| 659 | 分割数组为连续子序列 | Split Array into Consecutive Subsequences | Medium |
| 660 | Hard | |
| 661 | 图片平滑器 | Image Smoother |
Easy |
| 662 | 二叉树最大宽度 | Maximum Width of Binary Tree |
Medium |
| 663 | Medium | |
| 664 | 奇怪的打印机 | Strange Printer | Medium |
| 665 | 非递减数列 | Non-decreasing Array | Medium |
| 666 | Medium | |
| 667 | 优美的排列 II | Beautiful Arrangement II | Medium |
| 668 | 乘法表中第k小的数 | Kth Smallest Number in Multiplication Table |
Hard |
| 669 | 修剪二叉搜索树 | Trim a Binary Search Tree | Easy |
| 670 | 最大交换 | Maximum Swap |
Medium |
| 671 | 二叉树中第二小的节点 | Second Minimum Node In a Binary Tree | Easy |
| 672 | 灯泡开关 Ⅱ | Bulb Switcher II |
Medium |
| 673 | 最长递增子序列的个数 | Number of Longest Increasing Subsequence |
Medium |
| 674 | 最长连续递增序列 | Longest Continuous Increasing Subsequence | Easy |
| 675 | 为高尔夫比赛砍树 | Cut Off Trees for Golf Event | Hard |
| 676 | 实现一个魔法字典 | Implement Magic Dictionary |
Medium |
| 677 | 键值映射 | Map Sum Pairs |
Medium |
| 678 | 有效的括号字符串 | Valid Parenthesis String |
Medium |
| 679 | 24点游戏 | 24 Game | Medium |
| 680 | 验证回文字符串 Ⅱ | Valid Palindrome II |
Easy |
| 681 | Medium | |
| 682 | 棒球比赛 | Baseball Game |
Easy |
| 683 | Hard | |
| 684 | 冗余连接 | Redundant Connection | Medium |
| 685 | 冗余连接 II | Redundant Connection II |
Hard |
| 686 | 重复叠加字符串匹配 | Repeated String Match | Easy |
| 687 | 最长同值路径 | Longest Univalue Path |
Easy |
| 688 | “马”在棋盘上的概率 | Knight Probability in Chessboard |
Medium |
| 689 | 三个无重叠子数组的最大和 | Maximum Sum of 3 Non-Overlapping Subarrays | Hard |
| 690 | 员工的重要性 | Employee Importance | Easy |
| 691 | 贴纸拼词 | Stickers to Spell Word |
Hard |
| 692 | 前K个高频单词 | Top K Frequent Words |
Medium |
| 693 | 交替位二进制数 | Binary Number with Alternating Bits |
Easy |
| 694 | Medium | |
| 695 | 岛屿的最大面积 | Max Area of Island | Medium |
| 696 | 计数二进制子串 | Count Binary Substrings |
Easy |
| 697 | 数组的度 | Degree of an Array |
Easy |
| 698 | 划分为k个相等的子集 | Partition to K Equal Sum Subsets |
Medium |
| 699 | 掉落的方块 | Falling Squares |
Hard |
| 700 | 二叉搜索树中的搜索 | Search in a Binary Search Tree |
Easy |
| 701 | 二叉搜索树中的插入操作 | Insert into a Binary Search Tree | Medium |
| 702 | Medium | |
| 703 | 数据流中的第K大元素 | Kth Largest Element in a Stream |
Easy |
| 704 | 二分查找 | Binary Search |
Easy |
| 705 | 设计哈希集合 | Design HashSet |
Easy |
| 706 | 设计哈希映射 | Design HashMap |
Easy |
| 707 | 设计链表 | Design Linked List |
Easy |
| 708 | Medium | |
| 709 | 转换成小写字母 | To Lower Case |
Easy |
| 710 | 黑名单中的随机数 | Random Pick with Blacklist | Hard |
| 711 | Hard | |
| 712 | 两个字符串的最小ASCII删除和 | Minimum ASCII Delete Sum for Two Strings |
Medium |
| 713 | 乘积小于K的子数组 | Subarray Product Less Than K |
Medium |
| 714 | 买卖股票的最佳时机含手续费 | Best Time to Buy and Sell Stock with Transaction Fee |
Medium |
| 715 | Range 模块 | Range Module |
Hard |
| 716 | Easy | |
| 717 | 1比特与2比特字符 | 1-bit and 2-bit Characters |
Easy |
| 718 | 最长重复子数组 | Maximum Length of Repeated Subarray |
Medium |
| 719 | 找出第 k 小的距离对 | Find K-th Smallest Pair Distance |
Hard |
| 720 | 词典中最长的单词 | Longest Word in Dictionary |
Easy |
| 721 | 账户合并 | Accounts Merge |
Medium |
| 722 | 删除注释 | Remove Comments |
Medium |
| 723 | Medium | |
| 724 | 寻找数组的中心索引 | Find Pivot Index |
Easy |
| 725 | 分隔链表 | Split Linked List in Parts |
Medium |
| 726 | 原子的数量 | Number of Atoms |
Hard |
| 727 | Hard | |
| 728 | 自除数 | Self Dividing Numbers |
Easy |
| 729 | 我的日程安排表 I | My Calendar I |
Medium |
| 730 | 统计不同回文子字符串 | Count Different Palindromic Subsequences |
Hard |
| 731 | 我的日程安排表 II | My Calendar II |
Medium |
| 732 | 我的日程安排表 III | My Calendar III |
Hard |
| 733 | 图像渲染 | Flood Fill |
Easy |
| 734 | Easy | |
| 735 | 行星碰撞 | Asteroid Collision |
Medium |
| 736 | Lisp 语法解析 | Parse Lisp Expression |
Medium |
| 737 | Medium | |
| 738 | 单调递增的数字 | Monotone Increasing Digits | Medium |
| 739 | 每日温度 | Daily Temperatures |
Medium |
| 740 | 删除与获得点数 | Delete and Earn | Medium |
| 741 | 摘樱桃 | Cherry Pickup |
Hard |
| 742 | Medium | |
| 743 | 网络延迟时间 | Network Delay Time |
Medium |
| 744 | 寻找比目标字母大的最小字母 | Find Smallest Letter Greater Than Target | Easy |
| 745 | 前缀和后缀搜索 | Prefix and Suffix Search |
Hard |
| 746 | 使用最小花费爬楼梯 | Min Cost Climbing Stairs |
Easy |
| 747 | 至少是其他数字两倍的最大数 | Largest Number At Least Twice of Others | Easy |
| 748 | 最短完整词 | Shortest Completing Word |
Easy |
| 749 | 隔离病毒 | Contain Virus |
Hard |
| 750 | Medium | |
| 751 | Easy | |
| 752 | 打开转盘锁 | Open the Lock |
Medium |
| 753 | 破解保险箱 | Cracking the Safe |
Hard |
| 754 | 到达终点数字 | Reach a Number |
Easy |
| 755 | Medium | |
| 756 | 金字塔转换矩阵 | Pyramid Transition Matrix |
Medium |
| 757 | 设置交集大小至少为2 | Set Intersection Size At Least Two |
Hard |
| 758 | Easy | |
| 759 | Hard | |
| 760 | Easy | |
| 761 | 特殊的二进制序列 | Special Binary String | Hard |
| 762 | 二进制表示中质数个计算置位 | Prime Number of Set Bits in Binary Representation | Easy |
| 763 | 划分字母区间 | Partition Labels |
Medium |
| 764 | 最大加号标志 | Largest Plus Sign |
Medium |
| 765 | 情侣牵手 | Couples Holding Hands |
Hard |
| 766 | 托普利茨矩阵 | Toeplitz Matrix |
Easy |
| 767 | 重构字符串 | Reorganize String |
Medium |
| 768 | 最多能完成排序的块 II | Max Chunks To Make Sorted II |
Hard |
| 769 | 最多能完成排序的块 | Max Chunks To Make Sorted | Medium |
| 770 | 基本计算器 IV | Basic Calculator IV | Hard |
| 771 | 宝石与石头 | Jewels and Stones |
Easy |
| 772 | Hard | |
| 773 | 滑动谜题 | Sliding Puzzle |
Hard |
| 774 | Hard | |
| 775 | 全局倒置与局部倒置 | Global and Local Inversions |
Medium |
| 776 | Medium | |
| 777 | 在LR字符串中交换相邻字符 | Swap Adjacent in LR String |
Medium |
| 778 | 水位上升的泳池中游泳 | Swim in Rising Water |
Hard |
| 779 | 第K个语法符号 | K-th Symbol in Grammar |
Medium |
| 780 | 到达终点 | Reaching Points |
Hard |
| 781 | 森林中的兔子 | Rabbits in Forest |
Medium |
| 782 | 变为棋盘 | Transform to Chessboard |
Hard |
| 783 | 二叉搜索树结点最小距离 | Minimum Distance Between BST Nodes | Easy |
| 784 | 字母大小写全排列 | Letter Case Permutation | Easy |
| 785 | 判断二分图 | Is Graph Bipartite? |
Medium |
| 786 | 第 K 个最小的素数分数 | K-th Smallest Prime Fraction |
Hard |
| 787 | K 站中转内最便宜的航班 | Cheapest Flights Within K Stops |
Medium |
| 788 | 旋转数字 | Rotated Digits |
Easy |
| 789 | 逃脱阻碍者 | Escape The Ghosts |
Medium |
| 790 | 多米诺和托米诺平铺 | Domino and Tromino Tiling |
Medium |
| 791 | 自定义字符串排序 | Custom Sort String |
Medium |
| 792 | 匹配子序列的单词数 | Number of Matching Subsequences |
Medium |
| 793 | 阶乘函数后K个零 | Preimage Size of Factorial Zeroes Function |
Hard |
| 794 | 有效的井字游戏 | Valid Tic-Tac-Toe State |
Medium |
| 795 | 区间子数组个数 | Number of Subarrays with Bounded Maximum |
Medium |
| 796 | 旋转字符串 | Rotate String |
Easy |
| 797 | 所有可能的路径 | All Paths From Source to Target |
Medium |
| 798 | 得分最高的最小轮调 | Smallest Rotation with Highest Score |
Hard |
| 799 | 香槟塔 | Champagne Tower |
Medium |
| 800 | Easy | |
| 801 | 使序列递增的最小交换次数 | Minimum Swaps To Make Sequences Increasing | Medium |
| 802 | 找到最终的安全状态 | Find Eventual Safe States |
Medium |
| 803 | 打砖块 | Bricks Falling When Hit |
Hard |
| 804 | 唯一摩尔斯密码词 | Unique Morse Code Words |
Easy |
| 805 | 数组的均值分割 | Split Array With Same Average |
Hard |
| 806 | 写字符串需要的行数 | Number of Lines To Write String |
Easy |
| 807 | 保持城市天际线 | Max Increase to Keep City Skyline |
Medium |
| 808 | 分汤 | Soup Servings | Medium |
| 809 | 情感丰富的文字 | Expressive Words |
Medium |
| 810 | 黑板异或游戏 | Chalkboard XOR Game | Hard |
| 811 | 子域名访问计数 | Subdomain Visit Count |
Easy |
| 812 | 最大三角形面积 | Largest Triangle Area |
Easy |
| 813 | 最大平均值和的分组 | Largest Sum of Averages |
Medium |
| 814 | 二叉树剪枝 | Binary Tree Pruning | Medium |
| 815 | 公交路线 | Bus Routes |
Hard |
| 816 | 模糊坐标 | Ambiguous Coordinates |
Medium |
| 817 | 链表组件 | Linked List Components |
Medium |
| 818 | 赛车 | Race Car |
Hard |
| 819 | 最常见的单词 | Most Common Word |
Easy |
| 820 | 单词的压缩编码 | Short Encoding of Words |
Medium |
| 821 | 字符的最短距离 | Shortest Distance to a Character | Easy |
| 822 | 翻转卡片游戏 | Card Flipping Game |
Medium |
| 823 | 带因子的二叉树 | Binary Trees With Factors | Medium |
| 824 | 山羊拉丁文 | Goat Latin | Easy |
| 825 | 适龄的朋友 | Friends Of Appropriate Ages |
Medium |
| 826 | 安排工作以达到最大收益 | Most Profit Assigning Work |
Medium |
| 827 | 最大人工岛 | Making A Large Island |
Hard |
| 828 | 独特字符串 | Unique Letter String |
Hard |
| 829 | 连续整数求和 | Consecutive Numbers Sum |
Hard |
| 830 | 较大分组的位置 | Positions of Large Groups |
Easy |
| 831 | 隐藏个人信息 | Masking Personal Information |
Medium |
| 832 | 翻转图像 | Flipping an Image | Easy |
| 833 | 字符串中的查找与替换 | Find And Replace in String |
Medium |
| 834 | 树中距离之和 | Sum of Distances in Tree |
Hard |
| 835 | 图像重叠 | Image Overlap |
Medium |
| 836 | 矩形重叠 | Rectangle Overlap |
Easy |
| 837 | 新21点 | New 21 Game |
Medium |
| 838 | 推多米诺 | Push Dominoes |
Medium |
| 839 | 相似字符串组 | Similar String Groups |
Hard |
| 840 | 矩阵中的幻方 | Magic Squares In Grid |
Easy |
| 841 | 钥匙和房间 | Keys and Rooms |
Medium |
| 842 | 将数组拆分成斐波那契序列 | Split Array into Fibonacci Sequence |
Medium |
| 843 | 猜猜这个单词 | Guess the Word |
Hard |
| 844 | 比较含退格的字符串 | Backspace String Compare | Easy |
| 845 | 数组中的最长山脉 | Longest Mountain in Array |
Medium |
| 846 | 一手顺子 | Hand of Straights |
Medium |
| 847 | 访问所有节点的最短路径 | Shortest Path Visiting All Nodes |
Hard |
| 848 | 字母移位 | Shifting Letters |
Medium |
| 849 | 到最近的人的最大距离 | Maximize Distance to Closest Person |
Easy |
| 850 | 矩形面积 II | Rectangle Area II |
Hard |
| 851 | 喧闹和富有 | Loud and Rich |
Medium |
| 852 | 山脉数组的峰顶索引 | Peak Index in a Mountain Array | Easy |
| 853 | 车队 | Car Fleet |
Medium |
| 854 | 相似度为 K 的字符串 | K-Similar Strings |
Hard |
| 855 | 考场就座 | Exam Room |
Medium |
| 856 | 括号的分数 | Score of Parentheses |
Medium |
| 857 | 雇佣 K 名工人的最低成本 | Minimum Cost to Hire K Workers |
Hard |
| 858 | 镜面反射 | Mirror Reflection |
Medium |
| 859 | 亲密字符串 | Buddy Strings | Easy |
| 860 | 柠檬水找零 | Lemonade Change |
Easy |
| 861 | 翻转矩阵后的得分 | Score After Flipping Matrix |
Medium |
| 862 | 和至少为 K 的最短子数组 | Shortest Subarray with Sum at Least K |
Hard |
| 863 | 二叉树中所有距离为 K 的结点 | All Nodes Distance K in Binary Tree | Medium |
| 864 | 获取所有钥匙的最短路径 | Shortest Path to Get All Keys |
Hard |
| 865 | 具有所有最深结点的最小子树 | Smallest Subtree with all the Deepest Nodes | Medium |
| 866 | 回文素数 | Prime Palindrome |
Medium |
| 867 | 转置矩阵 | Transpose Matrix |
Easy |
| 868 | 二进制间距 | Binary Gap |
Easy |
| 869 | 重新排序得到 2 的幂 | Reordered Power of 2 | Medium |
| 870 | 优势洗牌 | Advantage Shuffle |
Medium |
| 871 | 最低加油次数 | Minimum Number of Refueling Stops | Hard |
| 872 | 叶子相似的树 | Leaf-Similar Trees | Easy |
| 873 | 最长的斐波那契子序列的长度 | Length of Longest Fibonacci Subsequence |
Medium |
| 874 | 模拟行走机器人 | Walking Robot Simulation |
Easy |
| 875 | 爱吃香蕉的珂珂 | Koko Eating Bananas |
Medium |
| 876 | 链表的中间结点 | Middle of the Linked List |
Easy |
| 877 | 石子游戏 | Stone Game |
Medium |
| 878 | 第 N 个神奇数字 | Nth Magical Number |
Hard |
| 879 | 盈利计划 | Profitable Schemes |
Hard |
| 880 | 索引处的解码字符串 | Decoded String at Index |
Medium |
| 881 | 救生艇 | Boats to Save People |
Medium |
| 882 | 细分图中的可到达结点 | Reachable Nodes In Subdivided Graph | Hard |
| 883 | 三维形体投影面积 | Projection Area of 3D Shapes |
Easy |
| 884 | 两句话中的不常见单词 | Uncommon Words from Two Sentences |
Easy |
| 885 | 螺旋矩阵 III | Spiral Matrix III |
Medium |
| 886 | 可能的二分法 | Possible Bipartition |
Medium |
| 887 | 鸡蛋掉落 | Super Egg Drop | Hard |
| 888 | 公平的糖果交换 | Fair Candy Swap |
Easy |
| 889 | 根据前序和后序遍历构造二叉树 | Construct Binary Tree from Preorder and Postorder Traversal | Medium |
| 890 | 查找和替换模式 | Find and Replace Pattern |
Medium |
| 891 | 子序列宽度之和 | Sum of Subsequence Widths |
Hard |
| 892 | 三维形体的表面积 | Surface Area of 3D Shapes |
Easy |
| 893 | 特殊等价字符串组 | Groups of Special-Equivalent Strings |
Easy |
| 894 | 所有可能的满二叉树 | All Possible Full Binary Trees |
Medium |
| 895 | 最大频率栈 | Maximum Frequency Stack |
Hard |
| 896 | 单调数列 | Monotonic Array |
Easy |
| 897 | 递增顺序查找树 | Increasing Order Search Tree |
Easy |
| 898 | 子数组按位或操作 | Bitwise ORs of Subarrays |
Medium |
| 899 | 有序队列 | Orderly Queue |
Hard |
| 900 | RLE 迭代器 | RLE Iterator |
Medium |
| 901 | 股票价格跨度 | Online Stock Span |
Medium |
| 902 | 最大为 N 的数字组合 | Numbers At Most N Given Digit Set |
Hard |
| 903 | DI 序列的有效排列 | Valid Permutations for DI Sequence |
Hard |
| 904 | 水果成篮 | Fruit Into Baskets |
Medium |
| 905 | 按奇偶排序数组 | Sort Array By Parity |
Easy |
| 906 | 超级回文数 | Super Palindromes |
Hard |
| 907 | 子数组的最小值之和 | Sum of Subarray Minimums |
Medium |
| 908 | 最小差值 I | Smallest Range I |
Easy |
| 909 | 蛇梯棋 | Snakes and Ladders |
Medium |
| 910 | 最小差值 II | Smallest Range II |
Medium |
| 911 | 在线选举 | Online Election | Medium |
| 912 | 排序数组 | Sort an Array |
Medium |
| 913 | 猫与老鼠 | Cat and Mouse | Hard |
| 914 | 一副牌中的X | X of a Kind in a Deck of Cards |
Easy |
| 915 | 将分区数组分成不相交的间隔 | Partition Array into Disjoint Intervals |
Medium |
| 916 | 单词子集 | Word Subsets | Medium |
| 917 | 仅仅反转字母 | Reverse Only Letters | Easy |
| 918 | 环形子数组的最大和 | Maximum Sum Circular Subarray | Medium |
| 919 | 完全二叉树插入器 | Complete Binary Tree Inserter |
Medium |
| 920 | 播放列表的数量 | Number of Music Playlists |
Hard |
| 921 | 使括号有效的最少添加 | Minimum Add to Make Parentheses Valid |
Medium |
| 922 | 按奇偶排序数组 II | Sort Array By Parity II |
Easy |
| 923 | 三数之和的多种可能 | 3Sum With Multiplicity | Medium |
| 924 | 尽量减少恶意软件的传播 | Minimize Malware Spread | Hard |
| 925 | 长按键入 | Long Pressed Name | Easy |
| 926 | 将字符串翻转到单调递增 | Flip String to Monotone Increasing |
Medium |
| 927 | 三等分 | Three Equal Parts |
Hard |
| 928 | 尽量减少恶意软件的传播 II | Minimize Malware Spread II |
Hard |
| 929 | 独特的电子邮件地址 | Unique Email Addresses | Easy |
| 930 | 和相同的二元子数组 | Binary Subarrays With Sum | Medium |
| 931 | 下降路径最小和 | Minimum Falling Path Sum | Medium |
| 932 | 漂亮数组 | Beautiful Array | Medium |
| 933 | 最近的请求次数 | Number of Recent Calls | Easy |
| 934 | 最短的桥 | Shortest Bridge |
Medium |
| 935 | 骑士拨号器 | Knight Dialer | Medium |
| 936 | 戳印序列 | Stamping The Sequence |
Hard |
| 937 | 重新排列日志文件 | Reorder Log Files | Easy |
| 938 | 二叉搜索树的范围和 | Range Sum of BST | Medium |
| 939 | 最小面积矩形 | Minimum Area Rectangle | Medium |
| 940 | 不同的子序列 II | Distinct Subsequences II | Hard |
| 941 | 有效的山脉数组 | Valid Mountain Array |
Easy |
| 942 | 增减字符串匹配 | DI String Match | Easy |
| 943 | 最短超级串 | Find the Shortest Superstring |
Hard |
| 944 | 删除列以使之有序 | Delete Columns to Make Sorted | Easy |
| 945 | 使数组唯一的最小增量 | Minimum Increment to Make Array Unique | Medium |
| 946 | 验证栈序列 | Validate Stack Sequences | Medium |
| 947 | 移除最多的同行或同列石头 | Most Stones Removed with Same Row or Column |
Medium |
| 948 | 令牌放置 | Bag of Tokens | Medium |
| 949 | 给定数字能组成的最大时间 | Largest Time for Given Digits | Easy |
| 950 | 按递增顺序显示卡牌 | Reveal Cards In Increasing Order |
Medium |
| 951 | 翻转等价二叉树 | Flip Equivalent Binary Trees |
Medium |
| 952 | 按公因数计算最大组件大小 | Largest Component Size by Common Factor | Hard |
| 953 | 验证外星语词典 | Verifying an Alien Dictionary | Easy |
| 954 | 二倍数对数组 | Array of Doubled Pairs | Medium |
| 955 | 删列造序 II | Delete Columns to Make Sorted II |
Medium |
| 956 | 最高的广告牌 | Tallest Billboard |
Hard |
| 957 | N天后的牢房 | Prison Cells After N Days |
Medium |
| 958 | 二叉树的完全性检验 | Check Completeness of a Binary Tree |
Medium |
| 959 | 由斜杠划分区域 | Regions Cut By Slashes | Medium |
| 960 | 删列造序 III | Delete Columns to Make Sorted III |
Hard |
| 961 | 重复 N 次的元素 | N-Repeated Element in Size 2N Array | Easy |
| 962 | 最大宽度坡 | Maximum Width Ramp | Medium |
| 963 | 最小面积矩形 II | Minimum Area Rectangle II | Medium |
| 964 | 表示数字的最少运算符 | Least Operators to Express Number | Hard |
| 965 | 单值二叉树 | Univalued Binary Tree | Easy |
| 966 | 元音拼写检查器 | Vowel Spellchecker |
Medium |
| 967 | 连续差相同的数字 | Numbers With Same Consecutive Differences |
Medium |
| 968 | 监控二叉树 | Binary Tree Cameras | Hard |
| 969 | 煎饼排序 | Pancake Sorting |
Medium |
| 970 | 强整数 | Powerful Integers |
Easy |
| 971 | 翻转二叉树以匹配先序遍历 | Flip Binary Tree To Match Preorder Traversal | Medium |
| 972 | 相等的有理数 | Equal Rational Numbers |
Hard |
| 973 | 最接近原点的 K 个点 | K Closest Points to Origin |
Medium |
| 974 | 和可被 K 整除的子数组 | Subarray Sums Divisible by K |
Medium |
| 975 | 奇偶跳 | Odd Even Jump |
Hard |
| 976 | 三角形的最大周长 | Largest Perimeter Triangle | Easy |
| 977 | 有序数组的平方 | Squares of a Sorted Array | Easy |
| 978 | 最长湍流子数组 | Longest Turbulent Subarray | Medium |
| 979 | 在二叉树中分配硬币 | Distribute Coins in Binary Tree |
Medium |
| 980 | 不同路径 III | Unique Paths III |
Hard |
| 981 | 基于时间的键值存储 | Time Based Key-Value Store | Medium |
| 982 | 按位与为零的三元组 | Triples with Bitwise AND Equal To Zero | Hard |
| 983 | 最低票价 | Minimum Cost For Tickets | Medium |
| 984 | 不含 AAA 或 BBB 的字符串 | String Without AAA or BBB | Medium |
| 985 | 查询后的偶数和 | Sum of Even Numbers After Queries |
Easy |
| 986 | 区间列表的交集 | Interval List Intersections | Medium |
| 987 | 二叉树的垂序遍历 | Vertical Order Traversal of a Binary Tree |
Medium |
| 988 | 从叶结点开始的最小字符串 | Smallest String Starting From Leaf | Medium |
| 989 | 数组形式的整数加法 | Add to Array-Form of Integer | Easy |
| 990 | 等式方程的可满足性 | Satisfiability of Equality Equations | Medium |
| 991 | 坏了的计算器 | Broken Calculator | Medium |
| 992 | K 个不同整数的子数组 | Subarrays with K Different Integers | Hard |
| 993 | 二叉树的堂兄弟节点 | Cousins in Binary Tree | Easy |
| 994 | 腐烂的橘子 | Rotting Oranges | Easy |
| 995 | K 连续位的最小翻转次数 | Minimum Number of K Consecutive Bit Flips |
Hard |
| 996 | 正方形数组的数目 | Number of Squareful Arrays | Hard |
| 997 | 找到小镇的法官 | Find the Town Judge |
Easy |
| 998 | 最大二叉树 II | Maximum Binary Tree II |
Medium |
| 999 | 车的可用捕获量 | Available Captures for Rook | Easy |
| 1000 | 合并石头的最低成本 | Minimum Cost to Merge Stones | Hard |
| 1001 | 网格照明 | Grid Illumination | Hard |
| 1002 | 查找常用字符 | Find Common Characters | Easy |
| 1003 | 检查替换后的词是否有效 | Check If Word Is Valid After Substitutions | Medium |
| 1004 | 最大连续1的个数 III | Max Consecutive Ones III | Medium |
| 1005 | K 次取反后最大化的数组和 | Maximize Sum Of Array After K Negations | Easy |
| 1006 | 笨阶乘 | Clumsy Factorial | Medium |
| 1007 | 行相等的最少多米诺旋转 | Minimum Domino Rotations For Equal Row | Medium |
| 1008 | 先序遍历构造二叉树 | Construct Binary Search Tree from Preorder Traversal | Medium |
| 1009 | 十进制整数的补码 | Complement of Base 10 Integer | Easy |
| 1010 | 总持续时间可被 60 整除的歌曲 | Pairs of Songs With Total Durations Divisible by 60 |
Easy |
| 1011 | 在 D 天内送达包裹的能力 | Capacity To Ship Packages Within D Days | Medium |
| 1012 | 至少有 1 位重复的数字 | Numbers With 1 Repeated Digit |
Hard |
| 1013 | 将数组分成和相等的三个部分 | Partition Array Into Three Parts With Equal Sum |
Easy |
| 1014 | 最佳观光组合 | Best Sightseeing Pair | Medium |
| 1015 | 可被 K 整除的最小整数 | Smallest Integer Divisible by K |
Medium |
| 1016 | 子串能表示从 1 到 N 数字的二进制串 | Binary String With Substrings Representing 1 To N |
Medium |
| 1017 | 负二进制转换 | Convert to Base -2 |
Medium |
| 1018 | 可被 5 整除的二进制前缀 | Binary Prefix Divisible By 5 |
Easy |
| 1019 | 链表中的下一个更大节点 | Next Greater Node In Linked List |
Medium |
| 1020 | 飞地的数量 | Number of Enclaves |
Medium |
| 1021 | 删除最外层的括号 | Remove Outermost Parentheses |
Easy |
| 1022 | 从根到叶的二进制数之和 | Sum of Root To Leaf Binary Numbers |
Easy |
| 1023 | 驼峰式匹配 | Camelcase Matching | Medium |
| 1024 | 视频拼接 | Video Stitching |
Medium |
| 1025 | 除数博弈 | Divisor Game | Easy |
| 1026 | 节点与其祖先之间的最大差值 | Maximum Difference Between Node and Ancestor |
Medium |
| 1027 | 最长等差数列 | Longest Arithmetic Sequence |
Medium |
| 1028 | 从先序遍历还原二叉树 | Recover a Tree From Preorder Traversal | Hard |
| 1029 | 两地调度 | Two City Scheduling | Easy |
| 1030 | 距离顺序排列矩阵单元格 | Matrix Cells in Distance Order |
Easy |
| 1031 | 两个非重叠子数组的最大和 | Maximum Sum of Two Non-Overlapping Subarrays |
Medium |
| 1032 | 字符流 | Stream of Characters |
Hard |
| 1033 | 移动石子直到连续 | Moving Stones Until Consecutive |
Easy |
| 1034 | 边框着色 | Coloring A Border |
Medium |
| 1035 | 不相交的线 | Uncrossed Lines |
Medium |
| 1036 | 逃离大迷宫 | Escape a Large Maze |
Hard |
| 1037 | 有效的回旋镖 | Valid Boomerang |
Easy |
| 1038 | 从二叉搜索树到更大和树 | Binary Search Tree to Greater Sum Tree |
Medium |
| 1039 | 多边形三角剖分的最低得分 | Minimum Score Triangulation of Polygon |
Medium |
| 1040 | 移动石子直到连续 II | Moving Stones Until Consecutive II |
Medium |
| 1041 | 困于环中的机器人 | Robot Bounded In Circle |
Easy |
| 1042 | 不邻接植花 | Flower Planting With No Adjacent |
Easy |
| 1043 | 分隔数组以得到最大和 | Partition Array for Maximum Sum |
Medium |
| 1044 | 最长重复子串 | Longest Duplicate Substring |
Hard |
| 1045 | 购买所有产品的客户 | Customers Who Bought All Products | Medium |
| 1046 | 最后一块石头的重量 | Last Stone Weight | Easy |
| 1047 | 删除字符串中的所有相邻重复项 | Remove All Adjacent Duplicates In String | Easy |
| 1048 | 最长字符串链 | Longest String Chain | Medium |
| 1049 | 最后一块石头的重量 II | Last Stone Weight II |
Medium |
| 1050 | 合作至少三次的演员和导演 | Actors and Directors Who Cooperated At Least Three Times | Easy |
| 1051 | 高度检查器 | Height Checker |
Easy |
| 1052 | 爱生气的书店老板 | Grumpy Bookstore Owner |
Medium |
| 1053 | 交换一次的先前排列 | Previous Permutation With One Swap |
Medium |
| 1054 | 距离相等的条形码 | Distant Barcodes | Medium |
| 1055 | ||
| 1056 | ||
| 1057 | ||
| 1058 | ||
| 1059 | ||
| 1060 | ||
| 1061 | ||
| 1062 | ||
| 1063 | ||
| 1064 | 不动点 | Fixed Point |
Easy |
| 1065 | 字符串的索引对 | Index Pairs of a String |
Easy |
| 1066 | 校园自行车分配 II | Campus Bikes II |
Medium |
| 1067 | 范围内的数字计数 | Digit Count in Range | Hard |
| 1068 | ||
| 1069 | ||
| 1070 | ||
| 1071 | 字符串的最大公因子 | Greatest Common Divisor of Strings | Easy |
| 1072 | 按列翻转得到最大值等行数 | Flip Columns For Maximum Number of Equal Rows |
Medium |
| 1073 | 负二进制数相加 | Adding Two Negabinary Numbers |
Medium |
| 1074 | 元素和为目标值的子矩阵数量 | Number of Submatrices That Sum to Target |
Hard |
| 1075 | ||
| 1076 | ||
| 1077 | ||
| 1078 | Bigram 分词 | Occurrences After Bigram | Easy |
| 1079 | 活字印刷 | Letter Tile Possibilities |
Medium |
| 1080 | 根到叶路径上的不足节点 | Insufficient Nodes in Root to Leaf Paths |
Medium |
| 1081 | 不同字符的最小子序列 | Smallest Subsequence of Distinct Characters |
Medium |
| 1082 | ||
| 1083 | ||
| 1084 | ||
| 1085 | 最小元素各数位之和 | Sum of Digits in the Minimum Number | Easy |
| 1086 | 前五科的均分 | High Five |
Easy |
| 1087 | 字母切换 | Permutation of Letters |
Medium |
| 1088 | 易混淆数 II | Confusing Number II |
Hard |
| 1089 | 复写零 | Duplicate Zeros |
Easy |
| 1090 | 受标签影响的最大值 | Largest Values From Labels |
Medium |
| 1091 | 二进制矩阵中的最短路径 | Shortest Path in Binary Matrix |
Medium |
| 1092 | 最短公共超序列 | Shortest Common Supersequence |
Hard |
| 1093 | 大样本统计 | Statistics from a Large Sample |
Medium |
| 1094 | 拼车 | Car Pooling |
Medium |
| 1095 | 山脉数组中查找目标值 | Find in Mountain Array |
Hard |
| 1096 | 花括号展开 II | Brace Expansion II |
Hard |
| 1097 | Hard | |
| 1098 | Medium | |
| 1099 | 小于 K 的两数之和 | Two Sum Less Than K |
Easy |
| 1100 | 长度为 K 的无重复字符子串 | Find K-Length Substrings With No Repeated Characters |
Medium |
| 1101 | 彼此熟识的最早时间 | The Earliest Moment When Everyone Become Friends | Medium |
| 1102 | 得分最高的路径 | Path With Maximum Minimum Value | Medium |
| 1103 | 分糖果 II | Distribute Candies to People | Easy |
| 1104 | 二叉树寻路 | Path In Zigzag Labelled Binary Tree | Easy |
| 1105 | 填充书架 | Filling Bookcase Shelves | Medium |
| 1106 | 解析布尔表达式 | Parsing A Boolean Expression | Hard |
| 1107 | Medium | |
| 1108 | IP 地址无效化 | Defanging an IP Address | Easy |
| 1109 | 航班预订统计 | Corporate Flight Bookings | Medium |
| 1110 | 删点成林 | Delete Nodes And Return Forest | Medium |
| 1111 | 有效括号的嵌套深度 | Maximum Nesting Depth of Two Valid Parentheses Strings | Medium |
| 1112 | Medium | |
| 1113 | Easy | |
| 1114 | 按序打印 | Print in Order | Easy |
| 1115 | 交替打印FooBar | Print FooBar Alternately | Medium |
| 1116 | 打印零与奇偶数 | Print Zero Even Odd | Medium |
| 1117 | H2O 生成 | Building H2O | Hard |
| 1118 | 一月有多少天 | Number of Days in a Month | Easy |
| 1119 | 删去字符串中的元音 | Remove Vowels from a String | Easy |
| 1120 | 子树的最大平均值 | Maximum Average Subtree | Medium |
| 1121 | 将数组分成几个递增序列 | Divide Array Into Increasing Sequences | Hard |
| 1122 | 数组的相对排序 | Relative Sort Array | Easy |
| 1123 | 最深叶节点的最近公共祖先 | Lowest Common Ancestor of Deepest Leaves | Medium |
| 1124 | 表现良好的最长时间段 | Longest Well-Performing Interval | Medium |
| 1125 | 最小的必要团队 | Smallest Sufficient Team | Hard |
| 1126 | ||
| 1127 | ||
| 1128 | 等价多米诺骨牌对的数量 | Number of Equivalent Domino Pairs | Easy |
| 1129 | 颜色交替的最短路径 | Shortest Path with Alternating Colors | Medium |
| 1130 | 叶值的最小代价生成树 | Minimum Cost Tree From Leaf Values | Medium |
| 1131 | 绝对值表达式的最大值 | Maximum of Absolute Value Expression | Medium |
| 1132 | Medium | |
| 1133 | 最大唯一数 | Largest Unique Number | Easy |
| 1134 | 阿姆斯特朗数 | Armstrong Number | Easy |
| 1135 | 最低成本联通所有城市 | Connecting Cities With Minimum Cost | Medium |
| 1136 | 平行课程 | Parallel Courses | Hard |
| 1137 | 第 N 个泰波那契数 | N-th Tribonacci Number | Easy |
| 1138 | 字母板上的路径 | Alphabet Board Path | Medium |
| 1139 | 最大的以 1 为边界的正方形 | Largest 1-Bordered Square | Medium |
| 1140 | 石子游戏 II | Stone Game II | Medium |
| 1141 | ||
| 1142 | ||
| 1143 | 最长公共子序列 | Longest Common Subsequence | Medium |
| 1144 | 递减元素使数组呈锯齿状 | Decrease Elements To Make Array Zigzag | Medium |
| 1145 | 二叉树着色游戏 | Binary Tree Coloring Game | Medium |
| 1146 | 快照数组 | Snapshot Array | Medium |
| 1147 | 段式回文 | Longest Chunked Palindrome Decomposition | Hard |
| 1148 | Easy | |
| 1149 | Medium | |
| 1150 | 检查一个数是否在数组中占绝大多数 | Check If a Number Is Majority Element in a Sorted Array | Easy |
| 1151 | 最少交换次数来组合所有的 1 | Minimum Swaps to Group All 1's Together | Medium |
| 1152 | 用户网站访问行为分析 | Analyze User Website Visit Pattern | Medium |
| 1153 | 字符串转化 | String Transforms Into Another String | Hard |
| 1154 | 一年中的第几天 | Ordinal Number Of Date | Easy |
| 1155 | 掷骰子的N种方法 | Number of Dice Rolls With Target Sum | Medium |
| 1156 | 单字符重复子串的最大长度 | Swap For Maximum Repeated Substring | Medium |
| 1157 | 子数组中占绝大多数的元素 | Online Majority Element In Subarray | Hard |
| 1158 | Medium | |
| 1159 | Hard | |
| 1160 | 拼写单词 | Find Words That Can Be Formed by Characters | Easy |
| 1161 | 最大层内元素和 | Maximum Level Sum of a Binary Tree | Medium |
| 1162 | 地图分析 | As Far from Land as Possible | Medium |
| 1163 | 按字典序排在最后的子串 | Last Substring in Lexicographical Order | Hard |
| 1164 | Medium | |
| 1165 | 单行键盘 | Single-Row Keyboard | Easy |
| 1166 | 设计文件系统 | Design File System | Medium |
| 1167 | 连接棒材的最低费用 | Minimum Cost to Connect Sticks | Medium |
| 1168 | 水资源分配优化 | Optimize Water Distribution in a Village | Hard |
| 1169 | 查询无效交易 | Invalid Transactions | Easy |
| 1170 | 比较字符串最小字母出现频次 | Compare Strings by Frequency of the Smallest Character | Easy |
| 1171 | 从链表中删去总和值为零的连续节点 | Remove Zero Sum Consecutive Nodes from Linked List | Hard |
| 1172 | 餐盘栈 | Dinner Plate Stacks | |
| 1173 | ||
| 1174 | ||
| 1175 | 质数排列 | Prime Arrangements | Easy |
| 1176 | 健身计划评估 | Diet Plan Performance | Easy |
| 1177 | 构建回文串检测 | Can Make Palindrome from Substring | Medium |
| 1178 | 猜字谜 | Number of Valid Words for Each Puzzle | Hard |
| 1179 | 重新格式化部门表 | Reformat Department Table | Easy |
| 1180 | 统计只含单一字母的子串 ｜ Count Substrings with Only One Distinct Letter | Easy |
| 1181 | 前后拼接 ｜ Before and After Puzzle | Medium |
| 1182 | 与目标颜色间的最短距离 ｜ Shortest Distance to Target Color | Medium |
| 1183 | 矩阵中 1 的最大数量 ｜ Maximum Number of Ones | Hard |
| 1184 | 公交站间的距离 | Distance Between Bus Stops | Easy |
| 1185 | 删除一次得到子数组最大和 | Maximum Subarray Sum with One Deletion | Easy |
| 1186 | 一周中的第几天 | Day of the Week | Medium |
| 1187 | 使数组严格递增 | Make Array Strictly Increasing | Hard |
| 1188 | ||
| 1189 | ||
| 1190 | ||
| 1191 | ||
| 1192 | ||
| 1193 | ||
| 1194 | ||
| 1195 | ||
| 1196 | ||
| 1197 | ||
| 1198 | ||
| 1199 | ||
| 1200 | ||