2020年4月18日
Codeforces676C
摘要： Vasya and String 题面 High school student Vasya got a string of length n as a birthday present. This string consists of letters 'a' and 'b' only. Vasya 阅读全文
posted @ 2020-04-18 11:02 qlu_zsh 阅读(82) 评论(0) 推荐(0)