839. 相似字符串组
Hard | Array, Hash Table, String, Depth-First Search, Breadth-First Search, Union-Find
Hash Table
893. 特殊等价字符串组
Medium | Array, Hash Table, String, Sorting
904. 水果成篮
Medium | Array, Hash Table, Sliding Window
923. 三数之和的多种可能
Medium | Array, Hash Table, Two Pointers, Sorting, Counting
929. 独特的电子邮件地址
Easy | Array, Hash Table, String
939. 最小面积矩形
Medium | Array, Hash Table, Math, Geometry, Sorting
959. 由斜杠分割的区域
Medium | Array, Hash Table, Depth-First Search, Breadth-First Search, Union-Find, Matrix
963. 最小面积矩形 II
Medium | Array, Hash Table, Math, Geometry
970. 强整数
Medium | Hash Table, Math, Enumeration
982. 按位与为零的三元组
Hard | Array, Hash Table, Bit Manipulation
996. 平方数组的数量
Hard | Array, Hash Table, Math, Dynamic Programming, Backtracking, Bit Manipulation, Bitmask
3217. 从链表中删除存在于数组中的节点
Medium | Array, Hash Table, Linked List
3223. 操作后字符串的最小长度
Medium | Hash Table, String, Counting
3224. 使数组差值相等的最少数组修改次数
Medium | Array, Hash Table, Prefix Sum
3238. 获胜玩家的数量
Easy | Array, Hash Table, Counting
3242. 设计邻居和服务
Easy | Array, Hash Table, Design, Matrix, Simulation
3265. 统计几乎相等数对 I
Medium | Array, Hash Table, Sorting, Counting, Enumeration
3267. 统计几乎相等数对 II
Hard | Array, Hash Table, Sorting, Counting, Enumeration
3272. 寻找好整数的数量
Hard | Hash Table, Math, Combinatorics, Enumeration
3289. 数字村的两个调皮数字
Easy | Array, Hash Table, Math