摘要: 题目网址:http://codeforces.com/contest/828/problem/B 题目: Polycarp has a checkered sheet of paper of size n × m. Polycarp painted some of cells with black, 阅读全文
posted @ 2017-07-12 16:09 ventricle 阅读(165) 评论(0) 推荐(0) 编辑