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Problem Statement "Teishi-zushi", a Japanese restaurant, is a plain restaurant with only one round counter. The outer circumference of the counter is 阅读全文
摘要：
Kuro is living in a country called Uberland, consisting of nn towns, numbered from 11to nn, and n−1n−1 bidirectional roads connecting these towns. It 阅读全文
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D - Handstand Time Limit: 2 sec / Memory Limit: 1024 MB Score : 400400 points Problem Statement NN people are arranged in a row from left to right. Yo 阅读全文