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The 2nd Universal Cup Finals is coming! Check out our event page, schedule, and competition rules!

Time Limit: 1 s Memory Limit: 64 MB Total points: 100

The problem was used in the following contest:

Subtask 9, 10, 11, 12, 13 分别对应 Subtask 1, 2, 3, 4, 5。

前 $8$ 个 Subtask 用于对应 Test groups，不计入分数。