摘要: Brain Network (easy) 题面翻译 给定一张 $n$ 个点 $m$ 条边的无向图,判断这是不是一棵树。 题目描述 One particularly well-known fact about zombies is that they move and think terribly s 阅读全文
posted @ 2023-01-02 19:01 PKU_IMCOMING 阅读(13) 评论(0) 推荐(0)