摘要: POJ-1308 Is It A Tree?(并查集判断是否是树) http://poj.org/problem?id=1308 Description A tree is a well-known data structure that is either empty (null, void, n 阅读全文
posted @ 2020-02-04 02:30 jiamian22 阅读(172) 评论(0) 推荐(0) 编辑