2017年10月13日
线段树 or 并查集 （多一个时间截点）
摘要： There is a company that has N employees(numbered from 1 to N),every employee in the company has a immediate boss (except for the leader of whole compa 阅读全文
posted @ 2017-10-13 21:35 楼主好菜啊 阅读(311) 评论(0) 推荐(0) 编辑
map + 前缀和
摘要： B. Balanced Substring time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output You are given a str 阅读全文
posted @ 2017-10-13 19:28 楼主好菜啊 阅读(639) 评论(0) 推荐(0) 编辑