2017年10月29日
在 n 道题目中挑选一些使得所有人对题目的掌握情况不超过一半。
摘要： Snark and Philip are preparing the problemset for the upcoming pre-qualification round for semi-quarter-finals. They have a bank of n problems, and th 阅读全文
posted @ 2017-10-29 12:24 Billyshuai 阅读(158) 评论(0) 推荐(0)