短语词组短语disjoint t sets 不相交的集disjoint closed sets 互斥闭集Disjoint difference sets 不相交差集Data Structures for Disjoint Sets 第二十一章;数据结构;不相交集的数据结构family of mutually disjoint sets 互不相交的集合族union -find set or disjoint sets 并查集 返回 disjoint sets