2008年7月30日星期三

ZJU/ZOJ 2833 Friendship 解题报告

题目大意是给出n个人之间的交往记录,问某个人拥有的朋友数,朋友关系具有传递性。

很明显的并查集结构模型,两个人成为朋友即并查集中的合并操作,合并过程中顺便进行计数累加就是了。询问操作即输出其所属集合的计数即可。注意读入不要用字符串,由于读入数据很大字符串操作要进行很多次,耗时过大。

3014301 2008-07-30 17:53:01 Accepted 2833 FPC 00:00.54 1388K IwfWcf@LZOI

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