QOJ.ac

QOJ

Time Limit: 2.0 s Memory Limit: 512 MB Hackable ✓

# 8140. Customs Controls 2

The problem was used in the following contest:

第八届中国大学生程序设计竞赛广州站（CCPC 2022 Guangzhou Site）

This problem is prepared by p_b_p_b .