QOJ.ac

QOJ

Time Limit: 3 s Memory Limit: 512 MB Total points: 100 Difficulty: [show]

#2304. 线图

该题目在以下比赛中使用过：

2018 浙江省队选拔赛 Day 1 (ZJOI 2018 Day 1)

This problem is prepared by jiry_2 .