QOJ.ac

QOJ

Time Limit: 2 s Memory Limit: 1024 MB Total points: 100

# 4007. 树

该题目在以下比赛中使用过：

2022 浙江省队选拔赛 Day 1 (ZJOI 2022 Day 1)

This problem is prepared by lcd, lwn_16, and suika_predator .