2018年7月24日
Prime Flip
摘要： 题目描述 There are infinitely many cards, numbered 1, 2, 3, … Initially, Cards x1, x2, …, xN are face up, and the others are face down.Snuke can perform t 阅读全文
posted @ 2018-07-24 23:04 行远山 阅读(185) 评论(0) 推荐(0) 编辑