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QOJ

Time Limit: 6.0 s Memory Limit: 512 MB Hackable ✓

# 6816. Invincible Hotwheels

The problem was used in the following contest:

第八届中国大学生程序设计竞赛桂林站（CCPC 2022 Guilin）

This problem is prepared by AntiLeaf and desprado2 .