1390. 四因数
Medium | Array, Math
Medium
1405. 最长快乐字符串
Medium | String, Greedy, Heap (Priority Queue)
1438. 绝对差不超过限制的最长连续子数组
Medium | Array, Queue, Sliding Window, Heap (Priority Queue), Ordered Set, Monotonic Queue
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
1443. 收集树中所有苹果的最短时间
Medium | Hash Table, Tree, Depth-First Search, Breadth-First Search
1447. 简化分数
Medium | Math, String, Number Theory
1452. 喜爱的公司列表不是其他列表子集的人
Medium | Array, Hash Table, String
1482. 制作 m 束花所需的最少天数
Medium | Array, Binary Search
1488. 避免洪水泛滥
Medium | Array, Hash Table, Binary Search, Greedy, Heap (Priority Queue)
1504. 统计全为1的子矩形
Medium | Array, Dynamic Programming, Stack, Matrix, Monotonic Stack