1358. 包含所有三种字符的子字符串数目
Medium | Hash Table, String, Sliding Window
Posts
1359. 统计所有有效的取货和交付选项
Hard | Math, Dynamic Programming, Combinatorics
1360. 计算两个日期之间的天数
Easy | Math, String
1361. 验证二叉树
Medium | Tree, Depth-First Search, Breadth-First Search, Union-Find, Graph Theory, Binary Tree
1363. 构成3的最大倍数
Hard | Array, Math, Dynamic Programming, Greedy, Sorting
1365. 有多少个数字比当前数字小
Easy | Array, Hash Table, Sorting, Counting Sort
1366. 通过投票对团队排名
Medium | Array, Hash Table, String, Sorting, Counting
1367. 二叉树中的链表
Medium | Linked List, Tree, Depth-First Search, Binary Tree
1368. 使网格中至少有一条有效路径的最小代价
Hard | Array, Breadth-First Search, Graph Theory, Heap (Priority Queue), Matrix, Shortest Path
1370. 递增递减字符串
Easy | Hash Table, String, Counting
1371. 包含所有元音字母出现偶数次的最长子字符串
Medium | Hash Table, String, Bit Manipulation, Prefix Sum
1372. 二叉树中的最长交错路径
Medium | Dynamic Programming, Tree, Depth-First Search, Binary Tree
1373. 二叉树中的最大 BST 子树
Hard | Dynamic Programming, Tree, Depth-First Search, Binary Search Tree, Binary Tree
1374. 生成每种字符都是奇数个的字符串
Easy | String
1375. 二进制字符串前缀一致的次数
Medium | Array
1376. 通知所有员工所需的时间
Medium | Tree, Depth-First Search, Breadth-First Search
1377. 青蛙位置
Hard | Tree, Depth-First Search, Breadth-First Search, Graph Theory
1379. 在二叉树的克隆中找到对应节点
Easy | Tree, Depth-First Search, Breadth-First Search, Binary Tree
1381. 设计一个支持增量操作的栈
Medium | Array, Stack, Design
1382. 平衡二叉搜索树
Medium | Divide and Conquer, Greedy, Tree, Depth-First Search, Binary Search Tree, Binary Tree