摘要: ARC076 C Reconciled? 如果$N = M$ 答案是$2N!M!$ 如果$|N M| = 1$ 答案是$N!M!$ 否则答案是0 cpp include define fi first define se second define pii pair define mp make_p 阅读全文
posted @ 2019-03-28 20:01 sigongzi 阅读(218) 评论(0) 推荐(0) 编辑