摘要: 题目连接 : http://codeforces.com/problemset/problem/891/A You have an array a with length n, you can perform operations. Each operation is like this: choo 阅读全文
posted @ 2019-01-13 18:52 快乐的黄鳝 阅读(225) 评论(0) 推荐(0)