摘要: 链接:https://ac.nowcoder.com/acm/contest/884/B来源:牛客网 题目描述 Your are given n sets.Every set contains some integers. We say a set can express an integer, o 阅读全文
posted @ 2019-08-02 21:54 一只球球 阅读(242) 评论(0) 推荐(0) 编辑