2018年12月31日
摘要: Codeforces 1091D New Year and the Permutation Concatenation https://codeforces.com/contest/1091/problem/D 题目: Let n be an integer. Consider all permut 阅读全文
posted @ 2018-12-31 02:36 Kidgzz 阅读(528) 评论(0) 推荐(0)