摘要: A Colorful Subsequence 答案是 $\prod_{c = 'a'}^{'z'} (cnt[c] + 1)$ cpp include define fi first define se second define pii pair define mp make_pair defin 阅读全文
posted @ 2019-03-22 14:23 sigongzi 阅读(676) 评论(0) 推荐(1) 编辑