Change Usernames（拓扑序列）
摘要：
题目链接 题目描述： You run a web service with $N$ users. The $i$-th user with a current handle $S_i$ wants to change it to $T_i$. Here, $S_1,…,$ and $S_N$ are 阅读全文
posted @ 2023-01-19 21:00 KSzh 阅读(26) 评论(0) 推荐(0) 编辑