ACM-ICPC 2018 徐州赛区网络预赛 A.Hard to prepare 【规律递推】

任意门：https://nanti.jisuanke.com/t/31453 A.Hard to prepare After Incident, a feast is usually held in Hakurei Shrine. This time Reimu asked Kokoro to deliver a Nogaku show during the feast. To enjoy the

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