2019年10月2日
Codeforces Round #590 (Div. 3)
摘要： D. Distinct Characters Queries Description You are given a string ss consisting of lowercase Latin letters and qq queries for this string. Recall that 阅读全文
posted @ 2019-10-02 13:51 kaike 阅读(453) 评论(0) 推荐(1) 编辑