2017年2月15日
D. Artsem and Saunders
摘要： Artsem has a friend Saunders from University of Chicago. Saunders presented him with the following problem. Let [n] denote the set {1, ..., n}. We wil 阅读全文
posted @ 2017-02-15 12:18 sCjTyC 阅读(524) 评论(0) 推荐(0)