摘要: 题目链接:http://codeforces.com/problemset/problem/16/E n fish, numbered from 1 to n, live in a lake. Every day right one pair of fish meet, and the probab 阅读全文
posted @ 2020-03-13 17:40 执||念 阅读(282) 评论(0) 推荐(0) 编辑