914. 卡牌分组
Easy | Array, Hash Table, Math, Counting, Number Theory
Hash Table
916. 单词子集
Medium | Array, Hash Table, String
924. 最小化恶意软件传播
Hard | Array, Hash Table, Depth-First Search, Breadth-First Search, Union-Find, Graph Theory
928. 最小化恶意软件的传播 II
Hard | Array, Hash Table, Depth-First Search, Breadth-First Search, Union-Find, Graph Theory
930. 和为目标值的二进制子数组
Medium | Array, Hash Table, Sliding Window, Prefix Sum
947. 移除最多的同行或同列石头
Medium | Hash Table, Depth-First Search, Union-Find, Graph Theory
952. 按公因数计算最大组件大小
Hard | Array, Hash Table, Math, Union-Find, Number Theory
953. 验证外星语词典
Easy | Array, Hash Table, String
954. 二倍数组
Medium | Array, Hash Table, Greedy, Sorting
957. N 天后的牢房
Medium | Array, Hash Table, Math, Bit Manipulation
961. 在长度为 2N 的数组中找出重复 N 次的元素
Easy | Array, Hash Table
966. 元音拼写检查器
Medium | Array, Hash Table, String
974. 和可被 K 整除的子数组
Medium | Array, Hash Table, Prefix Sum
981. 基于时间的键值存储
Medium | Hash Table, String, Binary Search, Design
987. 二叉树的垂序遍历
Hard | Hash Table, Tree, Depth-First Search, Breadth-First Search, Sorting, Binary Tree
992. 恰好K个不同整数的子数组
Hard | Array, Hash Table, Sliding Window, Counting
997. 找到小镇的法官
Easy | Array, Hash Table, Graph Theory
491. 非递减子序列
Medium | Array, Hash Table, Backtracking, Bit Manipulation
496. 下一个更大元素 I
Easy | Array, Hash Table, Stack, Monotonic Stack
500. 键盘行
Easy | Array, Hash Table, String