2017年5月14日
Codeforces 794F. Leha and security system 线段树
摘要： F. Leha and security system Bankopolis, the city you already know, finally got a new bank opened! Unfortunately, its security system is not yet workin 阅读全文
posted @ 2017-05-14 14:03 meekyan 阅读(511) 评论(0) 推荐(0) 编辑