1657. 确定两个字符串是否接近
Medium | Hash Table, String, Sorting, Counting
Counting
1684. 统计一致字符串的数目
Easy | Array, Hash Table, String, Bit Manipulation, Counting
1787. 使所有 K 个大小的段的异或为零
Hard | Array, Hash Table, Dynamic Programming, Bit Manipulation, Counting
1819. 不同子序列 GCD 的数量
Hard | Array, Math, Counting, Number Theory
1994. 好子集的数目
Hard | Array, Hash Table, Math, Dynamic Programming, Bit Manipulation, Counting, Number Theory, Bitmask
2006. 绝对差值为 K 的数对数目
Easy | Array, Hash Table, Counting
2014. 重复 k 次的最长子序列
Hard | Hash Table, Two Pointers, String, Backtracking, Counting, Enumeration
2023. 数字字符串配对
Medium | Array, Hash Table, String, Counting
2025. 数组分割的最大方案数
Hard | Array, Hash Table, Counting, Enumeration, Prefix Sum
2284. 单词数最多的发送者
Medium | Array, Hash Table, String, Counting