2020年1月28日
Educational Codeforces Round 36 (Rated for Div. 2) E. Physical Education Lessons(动态开点线段树）
摘要： 链接： https://codeforces.com/problemset/problem/915/E 题意： This year Alex has finished school, and now he is a first year student of Berland State Univer 阅读全文
posted @ 2020-01-28 14:20 YDDDD 阅读(193) 评论(0) 推荐(0)