1998. 数组的 GCD 排序
Hard | Array, Math, Union-Find, Sorting, Number Theory
Union-Find
1020. 飞地的数量
Medium | Array, Depth-First Search, Breadth-First Search, Union-Find, Matrix
1061. 字典序最小的等价字符串
Medium | String, Union-Find
1202. 交换字符串中的字符
Medium | Array, Hash Table, String, Depth-First Search, Breadth-First Search, Union-Find, Sorting
1254. 封闭岛屿的数目
Medium | Array, Depth-First Search, Breadth-First Search, Union-Find, Matrix
721. 账户合并
Medium | Array, Hash Table, String, Depth-First Search, Breadth-First Search, Union-Find, Sorting
765. 情侣牵手
Hard | Greedy, Depth-First Search, Breadth-First Search, Union-Find, Graph Theory
778. 水位上升的泳池中游泳
Hard | Array, Binary Search, Depth-First Search, Breadth-First Search, Union-Find, Heap (Priority Queue), Matrix
803. 打砖块
Hard | Array, Union-Find, Matrix
924. 最小化恶意软件传播
Hard | Array, Hash Table, Depth-First Search, Breadth-First Search, Union-Find, Graph Theory
928. 最小化恶意软件的传播 II
Hard | Array, Hash Table, Depth-First Search, Breadth-First Search, Union-Find, Graph Theory
947. 移除最多的同行或同列石头
Medium | Hash Table, Depth-First Search, Union-Find, Graph Theory
952. 按公因数计算最大组件大小
Hard | Array, Hash Table, Math, Union-Find, Number Theory
990. 等式方程的可满足性
Medium | Array, String, Union-Find, Graph Theory
684. 冗余连接
Medium | Depth-First Search, Breadth-First Search, Union-Find, Graph Theory
685. 冗余连接 II
Hard | Depth-First Search, Breadth-First Search, Union-Find, Graph Theory
352. 数据流的不相交区间
Hard | Hash Table, Binary Search, Union-Find, Design, Data Stream, Ordered Set
399. 除法求值
Medium | Array, String, Depth-First Search, Breadth-First Search, Union-Find, Graph Theory, Shortest Path
128. 最长连续序列
Medium | Array, Hash Table, Union-Find
130. 被围绕的区域
Medium | Array, Depth-First Search, Breadth-First Search, Union-Find, Matrix