3013. 将数组分割成子数组的最小代价 II
Hard | Array, Hash Table, Sliding Window, Heap (Priority Queue)
Hash Table
3321. 所有长度为 K 的子数组的 X 和 II
Hard | Array, Hash Table, Sliding Window, Heap (Priority Queue)
3548. 等和网格分割 II
Hard | Array, Hash Table, Matrix, Enumeration, Prefix Sum
745. 前缀和后缀搜索
Hard | Array, Hash Table, String, Design, Trie
770. 基础计算器 IV
Hard | Hash Table, Math, String, Stack, Recursion
1638. 统计只差一个字符的子字符串数目
Medium | Hash Table, String, Dynamic Programming, Enumeration
1657. 确定两个字符串是否接近
Medium | Hash Table, String, Sorting, Counting
1684. 统计一致字符串的数目
Easy | Array, Hash Table, String, Bit Manipulation, Counting
1711. 统计好数对的数目
Medium | Array, Hash Table
1719. 重构一棵树的方案数
Hard | Array, Hash Table, Tree, Graph Theory, Simulation