1 |
两数之和 |
Two Sum |
Easy |
Java |
2018-09-13 |
2 |
两数相加 |
Add Two Numbers |
Medium |
Java |
2018-12-18 |
3 |
无重复字符的最长子串 |
Longest Substring Without Repeating Characters |
Medium |
Java |
2018-12-21 |
6 |
Z 字形变换 |
ZigZag Conversion |
Medium |
Java |
2018-12-24 |
7 |
反转整数 |
Reverse Integer |
Easy |
Java |
2018-10-21 |
8 |
字符串转换整数 (atoi) |
String to Integer (atoi) |
Medium |
Java |
2018-12-24 |
9 |
回文数 |
Palindrome Number |
Easy |
Java |
2018-10-21 |
11 |
盛最多水的容器 |
Container With Most Water |
Medium |
Java |
2018-12-25 |
12 |
整数转罗马数字 |
Integer to Roman |
Medium |
Java |
2018-12-26 |
13 |
罗马数字转整数 |
Roman to Integer |
Easy |
Java |
2018-09-24 |
14 |
最长公共前缀 |
Longest Common Prefix |
Easy |
Java |
2018-09-25 |
15 |
三数之和 |
3Sum |
Medium |
Java |
2018-12-26 |
16 |
最接近的三数之和 |
3Sum Closest |
Medium |
Java |
2018-12-27 |
17 |
电话号码的字母组合 |
Letter Combinations of a Phone Number |
Medium |
Java |
2018-12-28 |
19 |
删除链表的倒数第N个节点 |
Remove Nth Node From End of List |
Medium |
Java |
2018-12-28 |
20 |
有效的括号 |
Valid Parentheses |
Easy |
Java |
2018-09-13 |
21 |
合并两个有序链表 |
Merge Two Sorted Lists |
Easy |
Java |
2018-10-12 |
22 |
括号生成 |
Generate Parentheses |
Medium |
Java |
2019-01-01 |
24 |
两两交换链表中的节点 |
Swap Nodes in Pairs |
Medium |
Java |
2019-01-01 |
26 |
删除排序数组中的重复项 |
Remove Duplicates from Sorted Array |
Easy |
Java |
2018-09-13 |
27 |
移除元素 |
Remove Element |
Easy |
Java |
2018-09-13 |
28 |
实现strStr() |
Implement strStr() |
Easy |
Java |
2018-09-25 |
29 |
两数相除 |
Divide Two Integers |
Medium |
Java |
2019-01-01 |
31 |
下一个排列 |
Next Permutation |
Medium |
Java |
2019-01-02 |
33 |
搜索旋转排序数组 |
Search in Rotated Sorted Array |
Medium |
Java |
2019-01-02 |
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 |
Java |
2019-01-03 |
36 |
有效的数独 |
Valid Sudoku |
Medium |
Java |
2019-01-03 |
38 |
报数 |
Count and Say |
Easy |
Java |
2018-09-25 |
39 |
组合总和 |
Combination Sum |
Medium |
Java |
2019-01-05 |
40 |
组合总和 II |
Combination Sum II |
Medium |
Java |
2019-01-05 |
43 |
字符串相乘 |
Multiply Strings |
Medium |
Java |
2019-01-07 |
46 |
全排列 |
Permutations |
Medium |
Java |
2019-01-06 |
47 |
全排列 II |
Permutations II |
Medium |
Java |
2019-01-06 |
48 |
旋转图像 |
Rotate Image |
Medium |
Java |
2019-01-07 |
49 |
字母异位词分组 |
Group Anagrams |
Medium |
Java |
2019-01-08 |
50 |
Pow(x, n) |
Pow(x, n) |
Medium |
Java |
2019-01-08 |
53 |
最大子序和 |
Maximum Subarray |
Easy |
Java |
2018-09-28 |
54 |
螺旋矩阵 |
Spiral Matrix |
Medium |
Java |
2019-01-09 |
55 |
跳跃游戏 |
Jump Game |
Medium |
Java |
2019-01-09 |
56 |
合并区间 |
Merge Intervals |
Medium |
Java |
2019-01-12 |
59 |
螺旋矩阵 II |
Spiral Matrix II |
Medium |
Java |
2019-01-12 |
61 |
旋转链表 |
Rotate List |
Medium |
Java |
2019-01-20 |
62 |
不同路径 |
Unique Paths |
Medium |
Java |
2019-01-20 |
64 |
最小路径和 |
Minimum Path Sum |
Medium |
Java |
2019-01-23 |
66 |
加一 |
Plus One |
Easy |
Java |
2019-04-22 |
67 |
二进制求和 |
Add Binary |
Easy |
Java |
2018-09-25 |
69 |
x 的平方根 |
Sqrt(x) |
Easy |
Java |
2018-09-22 |
70 |
爬楼梯 |
Climbing Stairs |
Easy |
Java |
2018-12-03 |
71 |
简化路径 |
Simplify Path |
Medium |
Java |
2019-03-06 |
73 |
矩阵置零 |
Set Matrix Zeroes |
Medium |
Java |
2019-03-06 |
74 |
搜索二维矩阵 |
Search a 2D Matrix |
Medium |
Java |
2019-03-07 |
75 |
颜色分类 |
Sort Colors |
Medium |
Java |
2019-03-07 |
82 |
删除排序链表中的重复元素 II |
Remove Duplicates from Sorted List II |
Medium |
Java |
2019-03-09 |
83 |
删除排序链表中的重复元素 |
Remove Duplicates from Sorted List |
Easy |
Java |
2018-10-12 |
86 |
分隔链表 |
Partition List |
Medium |
Java |
2019-03-10 |
88 |
合并两个有序数组 |
Merge Sorted Array |
Easy |
Java |
2019-02-23 |
92 |
反转链表 II |
Reverse Linked List II |
Medium |
Java |
2019-03-11 |
94 |
二叉树的中序遍历 |
Binary Tree Inorder Traversal |
Medium |
Java |
2019-03-12 |
95 |
不同的二叉搜索树 II |
Unique Binary Search Trees II |
Medium |
Java |
2019-05-02 |
96 |
不同的二叉搜索树 |
Unique Binary Search Trees |
Medium |
Java |
2019-03-13 |
100 |
相同的树 |
Same Tree |
Easy |
Java |
2018-11-05 |
101 |
对称二叉树 |
Symmetric Tree |
Easy |
Java |
2018-11-05 |
102 |
二叉树的层次遍历 |
Binary Tree Level Order Traversal |
Medium |
Java |
2019-03-18 |
103 |
二叉树的锯齿形层次遍历 |
Binary Tree Zigzag Level Order Traversal |
Medium |
Java |
2019-03-18 |
104 |
二叉树的最大深度 |
Maximum Depth of Binary Tree |
Easy |
Java |
2018-11-05 |
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 |
Java |
2019-03-19 |
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 |
Java |
2019-03-19 |
107 |
二叉树的层次遍历 II |
Binary Tree Level Order Traversal II |
Easy |
Java |
2018-11-26 |
108 |
将有序数组转换为二叉搜索树 |
Convert Sorted Array to Binary Search Tree |
Easy |
Java |
2018-11-06 |
109 |
有序链表转换二叉搜索树 |
Convert Sorted List to Binary Search Tree |
Medium |
Java |
2019-03-20 |
110 |
平衡二叉树 |
Balanced Binary Tree |
Easy |
Java |
2018-11-06 |
111 |
二叉树的最小深度 |
Minimum Depth of Binary Tree |
Easy |
Java |
2018-11-06 |
112 |
路径总和 |
Path Sum |
Easy |
Java |
2018-11-07 |
113 |
路径总和 II |
Path Sum II |
Medium |
Java |
2019-03-20 |
114 |
二叉树展开为链表 |
Flatten Binary Tree to Linked List |
Medium |
Java |
2019-03-21 |
117 |
填充每个节点的下一个右侧节点指针 II |
Populating Next Right Pointers in Each Node II |
Medium |
Java |
2019-03-21 |
120 |
三角形最小路径和 |
Triangle |
Medium |
Java |
2019-04-26 |
121 |
买卖股票的最佳时机 |
Best Time to Buy and Sell Stock |
Easy |
Java |
2018-09-28 |
122 |
买卖股票的最佳时机 II |
Best Time to Buy and Sell Stock II |
Easy |
Java |
2018-09-28 |
125 |
验证回文串 |
Valid Palindrome |
Easy |
Java |
2018-09-25 |
127 |
单词接龙 |
Word Ladder |
Medium |
Java |
2019-03-03 |
128 |
最长连续序列 |
Longest Consecutive Sequence |
Hard |
Java |
2019-03-02 |
129 |
求根到叶子节点数字之和 |
Sum Root to Leaf Numbers |
Medium |
Java |
2019-02-27 |
133 |
克隆图 |
Clone Graph |
Medium |
Java |
2019-02-26 |
134 |
加油站 |
Gas Station |
Medium |
Java |
2019-02-25 |
136 |
只出现一次的数字 |
Single Number |
Easy |
Java |
2018-10-04 |
137 |
只出现一次的数字 II |
Single Number II |
Medium |
Java |
2019-02-24 |
138 |
复制带随机指针的链表 |
Copy List with Random Pointer |
Medium |
Java |
2019-02-24 |
139 |
单词拆分 |
Word Break |
Medium |
Java |
2019-02-23 |
140 |
单词拆分 II |
Word Break II |
Hard |
Java |
2019-02-23 |
141 |
环形链表 |
Linked List Cycle |
Easy |
Java |
2018-10-12 |
142 |
环形链表 II |
Linked List Cycle II |
Medium |
Java |
2019-02-22 |
143 |
重排链表 |
Reorder List |
Medium |
Java |
2019-02-22 |
144 |
二叉树的前序遍历 |
Binary Tree Preorder Traversal |
Medium |
Java |
2019-02-21 |
145 |
二叉树的后序遍历 |
Binary Tree Postorder Traversal |
Hard |
Java |
2019-02-21 |
147 |
对链表进行插入排序 |
Insertion Sort List |
Medium |
Java |
2019-02-21 |
148 |
排序链表 |
Sort List |
Medium |
Java |
2019-02-21 |
150 |
逆波兰表达式求值 |
Evaluate Reverse Polish Notation |
Medium |
Java |
2019-02-20 |
155 |
最小栈 |
Min Stack |
Easy |
Java |
2018-09-13 |
160 |
相交链表 |
Intersection of Two Linked Lists |
Easy |
Java |
2018-10-13 |
168 |
Excel表列名称 |
Excel Sheet Column Title |
Easy |
Java |
2018-10-22 |
169 |
求众数 |
Majority Element |
Easy |
Java |
2018-09-28 |
171 |
Excel表列序号 |
Excel Sheet Column Number |
Easy |
Java |
2018-10-23 |
172 |
阶乘后的零 |
Factorial Trailing Zeroes |
Easy |
Java |
2018-10-23 |
173 |
二叉搜索树迭代器 |
Binary Search Tree Iterator |
Medium |
Java |
2019-03-22 |
175 |
组合两个表 |
Combine Two Tables |
Easy |
SQL |
2019-03-25 |
176 |
第二高的薪水 |
Second Highest Salary |
Easy |
SQL |
2019-03-25 |
181 |
超过经理收入的员工 |
Employees Earning More Than Their Managers |
Easy |
SQL |
2019-03-26 |
182 |
查找重复的电子邮箱 |
Duplicate Emails |
Easy |
SQL |
2019-03-26 |
183 |
从不订购的客户 |
Customers Who Never Order |
Easy |
SQL |
2019-03-27 |
190 |
颠倒二进制位 |
Reverse Bits |
Easy |
Java |
2018-10-16 |
191 |
位1的个数 |
Number of 1 Bits |
Easy |
Java |
2018-10-16 |
196 |
删除重复的电子邮箱 |
Delete Duplicate Emails |
Easy |
SQL |
2019-03-28 |
197 |
上升的温度 |
Rising Temperature |
Easy |
SQL |
2019-03-31 |
198 |
打家劫舍 |
House Robber |
Easy |
Java |
2018-12-07 |
199 |
二叉树的右视图 |
Binary Tree Right Side View |
Medium |
Java |
2019-03-22 |
200 |
岛屿的个数 |
Number of Islands |
Medium |
Java |
2019-03-04 |
202 |
快乐数 |
Happy Number |
Easy |
Java |
2018-10-04 |
203 |
移除链表元素 |
Remove Linked List Elements |
Easy |
Java |
2018-10-14 |
204 |
计数质数 |
Count Primes |
Easy |
Java |
2018-10-06 |
205 |
同构字符串 |
Isomorphic Strings |
Easy |
Java |
2018-10-06 |
206 |
反转链表 |
Reverse Linked List |
Easy |
Java |
2018-10-15 |
217 |
存在重复元素 |
Contains Duplicate |
Easy |
Java |
2018-09-28 |
219 |
存在重复元素 II |
Contains Duplicate II |
Easy |
Java |
2018-09-28 |
222 |
完全二叉树的节点个数 |
Count Complete Tree Nodes |
Medium |
Java |
2019-03-23 |
225 |
用队列实现栈 |
Implement Stack using Queues |
Easy |
Java |
2018-09-14 |
226 |
翻转二叉树 |
Invert Binary Tree |
Easy |
Java |
2018-11-26 |
230 |
二叉搜索树中第K小的元素 |
Kth Smallest Element in a BST |
Medium |
Java |
2019-03-23 |
231 |
2的幂 |
Power of Two |
Easy |
Java |
2018-10-16 |
232 |
用栈实现队列 |
Implement Queue using Stacks |
Easy |
Java |
2018-09-14 |
234 |
回文链表 |
Palindrome Linked List |
Easy |
Java |
2018-10-15 |
235 |
二叉搜索树的最近公共祖先 |
Lowest Common Ancestor of a Binary Search Tree |
Easy |
Java |
2018-11-27 |
236 |
二叉树的最近公共祖先 |
Lowest Common Ancestor of a Binary Tree |
Medium |
Java |
2019-03-25 |
237 |
删除链表中的节点 |
Delete Node in a Linked List |
Easy |
Java |
2018-10-15 |
242 |
有效的字母异位词 |
Valid Anagram |
Easy |
Java |
2018-09-13 |
257 |
二叉树的所有路径 |
Binary Tree Paths |
Easy |
Java |
2018-11-07 |
258 |
各位相加 |
Add Digits |
Easy |
Java |
2018-10-23 |
263 |
丑数 |
Ugly Number |
Easy |
Java |
2018-10-24 |
278 |
第一个错误的版本 |
First Bad Version |
Easy |
Java |
2018-09-22 |
290 |
单词模式 |
Word Pattern |
Easy |
Java |
2018-10-07 |
292 |
Nim游戏 |
Nim Game |
Easy |
Java |
2018-10-30 |
303 |
区域和检索 - 数组不可变 |
Range Sum Query - Immutable |
Easy |
Java |
2018-12-08 |
322 |
零钱兑换 |
Coin Change |
Medium |
Java |
2019-03-05 |
326 |
3的幂 |
Power of Three |
Easy |
Java |
2018-10-24 |
328 |
奇偶链表 |
Odd Even Linked List |
Medium |
Java |
2019-03-26 |
337 |
打家劫舍 III |
House Robber III |
Medium |
Java |
2019-03-26 |
338 |
比特位计数 |
Counting Bits |
Medium |
Java |
2019-04-15 |
342 |
4的幂 |
Power of Four |
Easy |
Java |
2018-10-17 |
344 |
反转字符串 |
Reverse String |
Easy |
Java |
2018-09-26 |
345 |
反转字符串中的元音字母 |
Reverse Vowels of a String |
Easy |
Java |
2018-09-26 |
349 |
两个数组的交集 |
Intersection of Two Arrays |
Easy |
Java |
2018-09-13 |
350 |
两个数组的交集 II |
Intersection of Two Arrays II |
Easy |
Java |
2018-09-13 |
367 |
有效的完全平方数 |
Valid Perfect Square |
Easy |
Java |
2018-09-22 |
371 |
两整数之和 |
Sum of Two Integers |
Easy |
Java |
2018-10-17 |
374 |
猜数字大小 |
Guess Number Higher or Lower |
Easy |
Java |
2018-09-23 |
383 |
赎金信 |
Ransom Note |
Easy |
Java |
2018-09-26 |
387 |
字符串中的第一个唯一字符 |
First Unique Character in a String |
Easy |
Java |
2018-09-26 |
389 |
找不同 |
Find the Difference |
Easy |
Java |
2018-10-06 |
400 |
第N个数字 |
Nth Digit |
Easy |
Java |
2018-10-24 |
401 |
二进制手表 |
Binary Watch |
Easy |
Java |
2018-10-17 |
404 |
左叶子之和 |
Sum of Left Leaves |
Easy |
Java |
2018-11-27 |
405 |
数字转换为十六进制数 |
Convert a Number to Hexadecimal |
Easy |
Java |
2018-10-18 |
409 |
最长回文串 |
Longest Palindrome |
Easy |
Java |
2018-10-07 |
412 |
Fizz Buzz |
Fizz Buzz |
Easy |
Java |
2018-12-10 |
413 |
等差数列划分 |
Arithmetic Slices |
Medium |
Java |
2019-04-29 |
415 |
字符串相加 |
Add Strings |
Easy |
Java |
2018-10-27 |
427 |
建立四叉树 |
Construct Quad Tree |
Easy |
Java |
2018-12-12 |
429 |
N叉树的层序遍历 |
N-ary Tree Level Order Traversal |
Easy |
Java |
2018-11-26 |
430 |
扁平化多级双向链表 |
Flatten a Multilevel Doubly Linked List |
Medium |
Java |
2019-03-27 |
434 |
字符串中的单词数 |
Number of Segments in a String |
Easy |
Java |
2018-09-26 |
437 |
路径总和 III |
Path Sum III |
Easy |
Java |
2018-11-27 |
438 |
找到字符串中所有字母异位词 |
Find All Anagrams in a String |
Easy |
Java |
2018-10-07 |
441 |
排列硬币 |
Arranging Coins |
Easy |
Java |
2018-09-23 |
443 |
压缩字符串 |
String Compression |
Easy |
Java |
2018-09-27 |
445 |
两数相加 II |
Add Two Numbers II |
Medium |
Java |
2019-03-30 |
447 |
回旋镖的数量 |
Number of Boomerangs |
Easy |
Java |
2018-10-08 |
448 |
找到所有数组中消失的数字 |
Find All Numbers Disappeared in an Array |
Easy |
Java |
2018-09-28 |
449 |
序列化和反序列化二叉搜索树 |
Serialize and Deserialize BST |
Medium |
Java |
2019-03-31 |
450 |
删除二叉搜索树中的节点 |
Delete Node in a BST |
Medium |
Java |
2019-04-01 |
453 |
最小移动次数使数组元素相等 |
Minimum Moves to Equal Array Elements |
Easy |
Java |
2018-10-27 |
455 |
分发饼干 |
Assign Cookies |
Easy |
Java |
2018-12-10 |
458 |
可怜的小猪 |
Poor Pigs |
Easy |
Java |
2018-12-12 |
459 |
重复的子字符串 |
Repeated Substring Pattern |
Easy |
Java |
2018-09-27 |
463 |
岛屿的周长 |
Island Perimeter |
Easy |
Java |
2018-10-08 |
475 |
供暖器 |
Heaters |
Easy |
Java |
2019-03-25 |
476 |
数字的补数 |
Number Complement |
Easy |
Java |
2018-10-19 |
479 |
最大回文数乘积 |
Largest Palindrome Product |
Easy |
Java |
2018-12-13 |
482 |
密钥格式化 |
License Key Formatting |
Easy |
Java |
2018-12-13 |
485 |
最大连续1的个数 |
Max Consecutive Ones |
Easy |
Java |
2018-09-28 |
492 |
构造矩形 |
Construct the Rectangle |
Easy |
Java |
2018-12-15 |
496 |
下一个更大元素 I |
Next Greater Element I |
Easy |
Java |
2018-09-17 |
500 |
键盘行 |
Keyboard Row |
Easy |
Java |
2018-10-08 |
501 |
二叉搜索树中的众数 |
Find Mode in Binary Search Tree |
Easy |
Java |
2018-11-28 |
504 |
七进制数 |
Base 7 |
Easy |
Java |
2018-12-15 |
506 |
相对名次 |
Relative Ranks |
Easy |
Java |
2018-12-16 |
507 |
完美数 |
Perfect Number |
Easy |
Java |
2018-10-27 |
508 |
出现次数最多的子树元素和 |
Most Frequent Subtree Sum |
Medium |
Java |
2019-04-01 |
509 |
斐波那契数 |
Fibonacci Number |
Easy |
Java |
2019-03-17 |
513 |
找树左下角的值 |
Find Bottom Left Tree Value |
Medium |
Java |
2019-04-02 |
515 |
在每个树行中找最大值 |
Find Largest Value in Each Tree Row |
Medium |
Java |
2019-04-04 |
518 |
零钱兑换 II |
Coin Change 2 |
Medium |
Java |
2019-03-05 |
520 |
检测大写字母 |
Detect Capital |
Easy |
Java |
2018-09-28 |
521 |
最长特殊序列 Ⅰ |
Longest Uncommon Subsequence I |
Easy |
Java |
2018-09-28 |
530 |
二叉搜索树的最小绝对差 |
Minimum Absolute Difference in BST |
Easy |
Java |
2018-12-05 |
532 |
数组中的K-diff数对 |
K-diff Pairs in an Array |
Easy |
Java |
2018-09-28 |
538 |
把二叉搜索树转换为累加树 |
Convert BST to Greater Tree |
Easy |
Java |
2018-11-28 |
541 |
反转字符串 II |
Reverse String II |
Easy |
Java |
2018-09-28 |
543 |
二叉树的直径 |
Diameter of Binary Tree |
Easy |
Java |
2018-11-29 |
551 |
学生出勤纪录 I |
Student Attendance Record I |
Easy |
Java |
2018-09-29 |
557 |
反转字符串中的单词 III |
Reverse Words in a String III |
Easy |
Java |
2018-09-29 |
558 |
四叉树交集 |
Quad Tree Intersection |
Easy |
Java |
2018-12-17 |
559 |
N叉树的最大深度 |
Maximum Depth of N-ary Tree |
Easy |
Java |
2018-11-07 |
561 |
数组拆分 I |
Array Partition I |
Easy |
Java |
2018-09-28 |
563 |
二叉树的坡度 |
Binary Tree Tilt |
Easy |
Java |
2018-11-30 |
572 |
另一个树的子树 |
Subtree of Another Tree |
Easy |
Java |
2018-11-30 |
575 |
分糖果 |
Distribute Candies |
Easy |
Java |
2018-10-08 |
589 |
N叉树的前序遍历 |
N-ary Tree Preorder Traversal |
Easy |
Java |
2018-11-30 |
590 |
N叉树的后序遍历 |
N-ary Tree Postorder Traversal |
Easy |
Java |
2018-11-30 |
594 |
最长和谐子序列 |
Longest Harmonious Subsequence |
Easy |
Java |
2018-10-10 |
598 |
范围求和 II |
Range Addition II |
Easy |
Java |
2018-10-27 |
599 |
两个列表的最小索引总和 |
Minimum Index Sum of Two Lists |
Easy |
Java |
2018-10-10 |
605 |
种花问题 |
Can Place Flowers |
Easy |
Java |
2018-09-28 |
606 |
根据二叉树创建字符串 |
Construct String from Binary Tree |
Easy |
Java |
2018-12-01 |
617 |
合并二叉树 |
Merge Two Binary Trees |
Easy |
Java |
2018-12-01 |
622 |
设计循环队列 |
Design Circular Queue |
Easy |
Java |
2018-09-22 |
623 |
在二叉树中增加一行 |
Add One Row to Tree |
Medium |
Java |
2019-04-04 |
628 |
三个数的最大乘积 |
Maximum Product of Three Numbers |
Easy |
Java |
2018-09-28 |
633 |
平方数之和 |
Sum of Square Numbers |
Easy |
Java |
2018-10-28 |
637 |
二叉树的层平均值 |
Average of Levels in Binary Tree |
Easy |
Java |
2018-12-01 |
641 |
设计循环双端队列 |
Design Circular Deque |
Easy |
Java |
2018-09-22 |
643 |
子数组最大平均数 I |
Maximum Average Subarray I |
Easy |
Java |
2018-09-28 |
645 |
错误的集合 |
Set Mismatch |
Easy |
Java |
2018-10-10 |
652 |
寻找重复的子树 |
Find Duplicate Subtrees |
Medium |
Java |
2019-04-06 |
653 |
两数之和 IV - 输入 BST |
Two Sum IV - Input is a BST |
Easy |
Java |
2018-12-02 |
654 |
最大二叉树 |
Maximum Binary Tree |
Medium |
Java |
2019-04-05 |
657 |
机器人能否返回原点 |
Robot Return to Origin |
Easy |
Java |
2018-09-29 |
661 |
图片平滑器 |
Image Smoother |
Easy |
Java |
2018-09-28 |
669 |
修剪二叉搜索树 |
Trim a Binary Search Tree |
Easy |
Java |
2018-12-02 |
671 |
二叉树中第二小的节点 |
Second Minimum Node In a Binary Tree |
Easy |
Java |
2018-12-02 |
674 |
最长连续递增序列 |
Longest Continuous Increasing Subsequence |
Easy |
Java |
2018-09-28 |
680 |
验证回文字符串 Ⅱ |
Valid Palindrome II |
Easy |
Java |
2018-09-29 |
682 |
棒球比赛 |
Baseball Game |
Easy |
Java |
2018-09-17 |
686 |
重复叠加字符串匹配 |
Repeated String Match |
Easy |
Java |
2018-09-30 |
687 |
最长同值路径 |
Longest Univalue Path |
Easy |
Java |
2018-12-03 |
690 |
员工的重要性 |
Employee Importance |
Easy |
Java |
2018-10-10 |
693 |
交替位二进制数 |
Binary Number with Alternating Bits |
Easy |
Java |
2018-10-19 |
695 |
岛屿的最大面积 |
Max Area of Island |
Medium |
Java |
2019-03-04 |
696 |
计数二进制子串 |
Count Binary Substrings |
Easy |
Java |
2018-09-30 |
697 |
数组的度 |
Degree of an Array |
Easy |
Java |
2018-09-28 |
700 |
二叉搜索树中的搜索 |
Search in a Binary Search Tree |
Easy |
Java |
2018-12-03 |
703 |
数据流中的第K大元素 |
Kth Largest Element in a Stream |
Easy |
Java |
2018-09-22 |
704 |
二分查找 |
Binary Search |
Easy |
Java |
2018-09-23 |
707 |
设计链表 |
Design Linked List |
Easy |
Java |
2018-10-15 |
709 |
转换成小写字母 |
To Lower Case |
Easy |
Java |
2018-10-01 |
712 |
两个字符串的最小ASCII删除和 |
Minimum ASCII Delete Sum for Two Strings |
Medium |
Java |
2019-05-02 |
720 |
词典中最长的单词 |
Longest Word in Dictionary |
Easy |
Java |
2018-10-11 |
724 |
寻找数组的中心索引 |
Find Pivot Index |
Easy |
Java |
2018-09-28 |
728 |
自除数 |
Self Dividing Numbers |
Easy |
Java |
2018-10-28 |
733 |
图像渲染 |
Flood Fill |
Easy |
Java |
2018-11-24 |
744 |
寻找比目标字母大的最小字母 |
Find Smallest Letter Greater Than Target |
Easy |
Java |
2018-09-24 |
747 |
至少是其他数字两倍的最大数 |
Largest Number At Least Twice of Others |
Easy |
Java |
2018-09-28 |
748 |
最短完整词 |
Shortest Completing Word |
Easy |
Java |
2018-12-12 |
754 |
到达终点数字 |
Reach a Number |
Easy |
Java |
2018-12-09 |
762 |
二进制表示中质数个计算置位 |
Prime Number of Set Bits in Binary Representation |
Easy |
Java |
2018-10-20 |
771 |
宝石与石头 |
Jewels and Stones |
Easy |
Java |
2018-10-11 |
783 |
二叉搜索树结点最小距离 |
Minimum Distance Between BST Nodes |
Easy |
Java |
2018-12-05 |
784 |
字母大小写全排列 |
Letter Case Permutation |
Easy |
Java |
2018-10-20 |
788 |
旋转数字 |
Rotated Digits |
Easy |
Java |
2018-10-01 |
796 |
旋转字符串 |
Rotate String |
Easy |
Java |
2018-12-15 |
804 |
唯一摩尔斯密码词 |
Unique Morse Code Words |
Easy |
Java |
2018-12-06 |
806 |
写字符串需要的行数 |
Number of Lines To Write String |
Easy |
Java |
2018-12-16 |
811 |
子域名访问计数 |
Subdomain Visit Count |
Easy |
Java |
2018-10-11 |
812 |
最大三角形面积 |
Largest Triangle Area |
Easy |
Java |
2018-10-28 |
819 |
最常见的单词 |
Most Common Word |
Easy |
Java |
2018-10-02 |
821 |
字符的最短距离 |
Shortest Distance to a Character |
Easy |
Java |
2018-12-17 |
824 |
山羊拉丁文 |
Goat Latin |
Easy |
Java |
2018-10-02 |
832 |
翻转图像 |
Flipping an Image |
Easy |
Java |
2018-12-04 |
836 |
矩形重叠 |
Rectangle Overlap |
Easy |
Java |
2018-12-09 |
840 |
矩阵中的幻方 |
Magic Squares In Grid |
Easy |
Java |
2018-09-13 |
844 |
比较含退格的字符串 |
Backspace String Compare |
Easy |
Java |
2018-09-17 |
849 |
到最近的人的最大距离 |
Maximize Distance to Closest Person |
Easy |
Java |
2018-09-13 |
852 |
山脉数组的峰顶索引 |
Peak Index in a Mountain Array |
Easy |
Java |
2018-09-24 |
859 |
亲密字符串 |
Buddy Strings |
Easy |
Java |
2018-12-06 |
860 |
柠檬水找零 |
Lemonade Change |
Easy |
Java |
2018-12-11 |
867 |
转置矩阵 |
Transpose Matrix |
Easy |
Java |
2018-09-13 |
868 |
二进制间距 |
Binary Gap |
Easy |
Java |
2018-12-09 |
872 |
叶子相似的树 |
Leaf-Similar Trees |
Easy |
Java |
2018-11-24 |
874 |
模拟行走机器人 |
Walking Robot Simulation |
Easy |
Java |
2018-12-11 |
876 |
链表的中间结点 |
Middle of the Linked List |
Easy |
Java |
2018-10-15 |
883 |
三维形体投影面积 |
Projection Area of 3D Shapes |
Easy |
Java |
2018-10-28 |
884 |
两句话中的不常见单词 |
Uncommon Words from Two Sentences |
Easy |
Java |
2018-10-11 |
888 |
公平的糖果交换 |
Fair Candy Swap |
Easy |
Java |
2018-09-13 |
892 |
三维形体的表面积 |
Surface Area of 3D Shapes |
Easy |
Java |
2018-10-29 |
893 |
特殊等价字符串组 |
Groups of Special-Equivalent Strings |
Easy |
Java |
2018-12-06 |
896 |
单调数列 |
Monotonic Array |
Easy |
Java |
2018-09-13 |
897 |
递增顺序查找树 |
Increasing Order Search Tree |
Easy |
Java |
2018-11-24 |
905 |
按奇偶排序数组 |
Sort Array By Parity |
Easy |
Java |
2018-12-04 |
908 |
最小差值 I |
Smallest Range I |
Easy |
Java |
2018-12-16 |
914 |
卡牌分组 |
X of a Kind in a Deck of Cards |
Easy |
Java |
2018-10-29 |
917 |
仅仅反转字母 |
Reverse Only Letters |
Easy |
Java |
2018-12-15 |
922 |
按奇偶排序数组 II |
Sort Array By Parity II |
Easy |
Java |
2018-12-16 |
925 |
长按键入 |
Long Pressed Name |
Easy |
Java |
2018-12-18 |
929 |
独特的电子邮件地址 |
Unique Email Addresses |
Easy |
Java |
2018-12-06 |
933 |
最近的请求次数 |
Number of Recent Calls |
Easy |
Java |
2018-12-17 |
937 |
重新排列日志文件 |
Reorder Log Files |
Easy |
Java |
2018-12-07 |
941 |
有效的山脉数组 |
Valid Mountain Array |
Easy |
Java |
2018-12-04 |
942 |
增减字符串匹配 |
DI String Match |
Easy |
Java |
2018-12-09 |
944 |
删列造序 |
Delete Columns to Make Sorted |
Easy |
Java |
2018-12-11 |
949 |
给定数字能组成的最大时间 |
Largest Time for Given Digits |
Easy |
Java |
2018-12-09 |
953 |
验证外星语词典 |
Verifying an Alien Dictionary |
Easy |
Java |
2018-12-16 |
961 |
重复 N 次的元素 |
N-Repeated Element in Size 2N Array |
Easy |
Java |
2019-03-17 |
965 |
单值二叉树 |
Univalued Binary Tree |
Easy |
Java |
2019-03-16 |
993 |
二叉树的堂兄弟节点 |
Cousins in Binary Tree |
Easy |
Java |
2019-03-17 |