| 830 较大分组的位置 |
Positions of Large Groups |
↗ |
Easy |
| 766 托普利茨矩阵 |
Toepliz Matrix |
↗ |
Easy |
| 747 至少是其余数字两倍的最大数 |
Largest Number At Least Twice of Others |
↗ |
Easy |
| 746 使用最小花费爬楼梯 |
Min Cost Climbing Stairs |
↗ |
Easy |
| 559 N 叉树的最大深度 |
Maximum Depth of N Ary Tree |
↗ |
Easy |
| 687 最长同值路径 |
Longest Univalue Path |
↗ |
Easy |
| 669 修剪二叉搜索树 |
Trim A Binary Search Tree |
↗ |
Easy |
| 653 两数之和 IV - 输入 BST |
Two Sum IV Input Is A BST |
↗ |
Easy |
| 637 二叉树的层平均值 |
Average of Level Values |
↗ |
Easy |
| 617 合并二叉树 |
Merge Two Binary Trees |
↗ |
Easy |
| 606 根据二叉树建立字符串 |
Construct String From Binary Tree |
↗ |
Easy |
| 724 寻找数组的中心索引 |
Find Pivot Index |
↗ |
Easy |
| 717 1 比特与 2 比特字符 |
1 Bit and 2 Bit Characters |
↗ |
Easy |
| 697 数组的度 |
Degree of An Array |
↗ |
Easy |
| 674 最长连续递增序列 |
Longest Continuous Increasing Subsequence |
↗ |
Easy |
| 665 非递减数列 |
Non Decreasing Array |
↗ |
Easy |
| 661 图片平滑器 |
Image Smoother |
↗ |
Easy |
| 643 子数组最大平均数 I |
Maximum Average Subarray I |
↗ |
Easy |
| 628 三个数的最大乘积 |
Maximum Product of Three Numbers |
↗ |
Easy |
| 605 种花问题 |
Can Place Flowers |
↗ |
Easy |
| 581 最短无序连续子数组 |
Shortest Unsorted Continuous Subarray |
↗ |
Easy |
| 566 重塑矩阵 |
Reshape the Matrix |
[↗]() |
Easy |
| 561 数组拆分 I |
Array Partition I |
↗ |
Easy |
| 532 数组中的 K-diff 数对 |
K Diff Pairs in An Array |
↗ |
Easy |
| 485 最大连续 1 的个数 |
Max Consecutive Ones |
↗ |
Easy |
| 572 另外一棵树的子树 |
Subtree of Another Tree |
↗ |
Easy |
| 563 二叉树的坡度 |
Bianry Tree Tilt |
↗ |
Easy |
| 543 二叉树的直径 |
Diameter of Binary Tree |
↗ |
Easy |
| 538 把二叉搜索树转换为累加树 |
Converse BST to Greater Tree |
↗ |
Easy |
| 501 二叉搜索树中的众数 |
Find Mode in Binary Search Tree |
↗ |
Easy |
| 984 不含 AAA 或 BBB 的字符串 |
String Without AAA or BBB |
↗ |
Easy |
| 944 删列造序 |
Delete Columns to Make Sorted |
↗ |
Easy |
| 874 模拟机器人行走 |
Walking Robot Simulation |
↗ |
Easy |
| 860 柠檬水找零 |
Lemonade Change |
↗ |
Easy |
| 463 岛屿的周长 |
Island Perimeter |
↗ |
Easy |
| 461 汉明距离 |
Hamming Distance |
↗ |
Easy |
| 459 重复的子字符串 |
Repeated Substring Pattern |
↗ |
Easy |
| 458 可怜的小猪 |
Poor Pigs |
↗ |
Easy |
| 455 分发饼干 |
Assign Cookies |
↗ |
Easy |
| 453 最小移动次数使数组元素相等 |
Minimum Moves to Equal Array Elements |
↗ |
Easy |
| 448 找到数组中消失的全部数字 |
Find All Numbers Disappeared in An Array |
↗ |
Easy |
| 447 回旋镖的数量 |
Number of Boomerangs |
↗ |
Easy |
| 443 压缩字符串 |
String Compression |
↗ |
Easy |
| 441 排列硬币 |
Arranging Coins |
↗ |
Easy |
| 438 找到字符串中全部字母异或词 |
Find All Anagrams in A String |
↗ |
Easy |
| 437 路径总和 III |
Path Sum III |
↗ |
Easy |
| 434 字符串中的单词数 |
Number of Segments in A String |
↗ |
Easy |
| 429 N 叉树的层序遍历 |
N Ary Tree Level Order Traversal |
↗ |
Easy |
| 427 创建四叉树 |
Construct Quad Tree |
↗ |
Easy |
| 415 字符串相加 |
Add Strings |
↗ |
Easy |
| 414 第三大的数 |
Third Maximum Num |
↗ |
Easy |
| 412 Fizz Buzz |
Fizz Buzz |
↗ |
Easy |
| 409 最长回文串 |
Longest Palindrome |
↗ |
Easy |
| 405 数字转换为十六进制数 |
Convert A Number to Hexadecimal |
↗ |
Easy |
| 404 左叶子之和 |
Sum of Left Leaves |
↗ |
Easy |
| 401 二进制手表 |
Binary Watch |
↗ |
Easy |
| 400 第 N 个数字 |
Nth Digit |
↗ |
Easy |
| 389 找不一样 |
Find The Difference |
↗ |
Easy |
| 387 字符串中的第一个惟一字符 |
First Unique Character in A String |
↗ |
Easy |
| 383 赎金信 |
Ronsom Note |
↗ |
Easy |
| 374 猜数字大小 |
Guess Number Higher or Lower |
↗ |
Easy |
| 371 两整数之和 |
Sum of Two Integers |
↗ |
Easy |
| 367 有效的彻底平方数 |
Valid Perfect Square |
↗ |
Easy |
| 350 两个数组的交集 II |
Intersection of Two Arrays II |
↗ |
Easy |
| 349 两个数组的交集 |
Intersection of Two Arrays |
↗ |
Easy |
| 345 反转字符串中的元音字母 |
Reverse Vowels of A String |
↗ |
Easy |
| 344 反转字符串 |
Reverse String |
↗ |
Easy |
| 342 4 的幂 |
Power of Four |
↗ |
Easy |
| 326 3 的幂 |
Power of Three |
↗ |
Easy |
| 303 区域和检索 - 数组不可变 |
Range Sum Query Immutable |
↗ |
Easy |
| 292 Nim 游戏 |
Nim Game |
↗ |
Easy |
| 290 单词模式 |
Word Pattern |
↗ |
Easy |
| 283 移动零 |
Move Zeroes |
↗ |
Easy |
| 278 第一个错误的版本 |
First Bad Version |
↗ |
Easy |
| 268 缺失数字 |
Missing Number |
↗ |
Easy |
| 263 丑数 |
Ugly Number |
↗ |
Easy |
| 258 各位相加 |
Add Digits |
↗ |
Easy |
| 257 二叉树的全部路径 |
Binary Tree Paths |
↗ |
Easy |
| 242 有效的字母异或词 |
Valid Anagram |
↗ |
Easy |
| 237 删除链表中的节点 |
Delete Node in A Linked List |
↗ |
Easy |
| 235 二叉搜索树的最近公共祖先 |
Lowest Common Ancester of A Binary Search Tree |
↗ |
Easy |
| 234 回文链表 |
Palindrome Linked List |
↗ |
Easy |
| 232 用栈实现队列 |
Implement Queue Using Stacks |
↗ |
Easy |
| 231 2 的幂 |
Power of Two |
↗ |
Easy |
| 226 翻转二叉树 |
Invert Binary Tree |
↗ |
Easy |
| 225 用队列实现栈 |
Implement Stack Using Queues |
↗ |
Easy |
| 219 存在重复元素 II |
Contains Duplicate II |
↗ |
Easy |
| 217 存在重复元素 |
Contains Duplicate |
↗ |
Easy |
| 206 反转链表 |
Reverse Linked List |
↗ |
Easy |
| 205 同构字符串 |
Isomorphic Strings |
↗ |
Easy |
| 204 计数质数 |
Count Primes |
↗ |
Easy |
| 203 移出链表元素 |
Remove Linked List Elements |
↗ |
Easy |
| 202 快乐数 |
Happy Number |
↗ |
Easy |
| 198 打家劫舍 |
House Robber |
↗ |
Easy |
| 191 位 1 的个数 |
Number of 1 Bits |
↗ |
Easy |
| 190 颠倒二进制位 |
Reverse Bits |
↗ |
Easy |
| 189 旋转数组 |
Rotate Array |
↗ |
Easy |
| 172 阶乘后的零 |
Factorial Trailing Zeors |
↗ |
Easy |
| 171 Excel 表列序号 |
Excel Sheet Column Number |
↗ |
Easy |
| 169 求众数 |
Majority Element |
↗ |
Easy |
| 168 Excel 表列名称 |
Excel Sheet Column Title |
↗ |
Easy |
| 167 两数之和 II - 输入有序数组 |
Two Sum II Input Array Is Sorted |
↗ |
Easy |
| 160 相交链表 |
Intersection of Two Linked List |
↗ |
Easy |
| 155 最小栈 |
Min Stack |
↗ |
Easy |
| 141 环形链表 |
Linked List Code |
↗ |
Easy |
| 136 只出现一次的数字 |
Single Number |
↗ |
Easy |
| 125 验证回文字符串 |
Valid Palindrome |
↗ |
Easy |
| 122 买卖股票的最佳时机 II |
Best Time to Buy and Sell Stock II |
↗ |
Easy |
| 121 买卖股票的最佳时机 |
Best Time to Buy and Sell Stock |
↗ |
Easy |
| 119 杨辉三角 II |
Pascals Triangle II |
↗ |
Easy |
| 118 杨辉三角 |
Pascals Triangle |
↗ |
Easy |
| 112 路径总和 |
Path Sum |
↗ |
Easy |
| 111 二叉树的最小深度 |
Minimum Depth of Binary Tree |
↗ |
Easy |
| 110 平衡二叉树 |
Balanced Binary Tree |
↗ |
Easy |
| 108 将有序数组转换为二叉搜索树 |
Convert Sorted Array to Binary Search Tree |
↗ |
Easy |
| 107 二叉树的层次遍历 II |
Binary Tree Level Order Traversal II |
↗ |
Easy |
| 104 二叉树的最大深度 |
Maximum Depth of Binary Tree |
↗ |
Easy |
| 101 对称二叉树 |
Symmetric Tree |
↗ |
Easy |
| 100 相同的树 |
Same Tree |
↗ |
Easy |
| 088 合并两个有序数组 |
Merge Sorted Array |
↗ |
Easy |
| 083 删除排序链表中的重复元素 |
Remove Duplicates from Sorted List |
↗ |
Easy |
| 070 爬楼梯 |
Climbing Stairs |
↗ |
Easy |
| 069 x 的平方根 |
Sqrt X |
↗ |
Easy |
| 068 二进制求和 |
Add Binary |
↗ |
Easy |
| 066 加一 |
Plus One |
↗ |
Easy |
| 058 最后一个单词的长度 |
Length of Last Word |
↗ |
Easy |
| 053 最大子序和 |
Maximum Subarray |
↗ |
Easy |
| 038 报数 |
Count and say |
↗ |
Easy |
| 035 搜索插入位置 |
Search Insert Position |
↗ |
Easy |
| 028 实现 strStr() |
Implement strStr() |
↗ |
Easy |
| 027 移除元素 |
Remove Element |
↗ |
Easy |
| 026 删除排序数组中的重复项 |
Romove Duplicates From Sorted Array |
↗ |
Easy |
| 021 合并两个有序链表 |
Merge Two Sorted Lists |
↗ |
Easy |
| 020 有效的括号 |
Valid Parentheses |
↗ |
Easy |
| 014 最长公共前缀 |
Longest Common Prefix |
↗ |
Easy |
| 013 罗马数字转整数 |
Roman to Integer |
↗ |
Easy |
| 009 回文数 |
Palindrome Number |
↗ |
Easy |
| 007 反转整数 |
Reverse Integer |
↗ |
Easy |
| 001 两数之和 |
Two Sum |
↗ |
Easy |
