1239. 具有唯一字符的最长子序列
Medium | Array, String, Backtracking, Bit Manipulation
Bit Manipulation
1349. 参加考试的最大学生数
Hard | Array, Dynamic Programming, Bit Manipulation, Matrix, Bitmask
1356. 根据数字二进制下1的数目排序
Easy | Array, Bit Manipulation, Sorting, Counting
1442. 统计能形成两个相等异或数组的三元组
Medium | Array, Hash Table, Math, Bit Manipulation, Prefix Sum
1483. 树节点的第K个祖先
Hard | Binary Search, Dynamic Programming, Bit Manipulation, Tree, Depth-First Search, Breadth-First Search, Design
1595. 连接两组点的最小成本
Hard | Array, Dynamic Programming, Bit Manipulation, Matrix, Bitmask
1915. 神奇字符串的数目
Medium | Hash Table, String, Bit Manipulation, Prefix Sum
2791. 统计可以形成回文的树中路径数目
Hard | Hash Table, Bit Manipulation, Tree, Depth-First Search
318. 单词长度最大乘积
Medium | Array, String, Bit Manipulation
3575. 最大好子树分数
Hard | Array, Dynamic Programming, Bit Manipulation, Tree, Depth-First Search, Bitmask