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Divided Land Problem Description It’s time to fight the local despots and redistribute the land. There is a rectangular piece of land granted from the 阅读全文
摘要：
Problem F Problem Description There are n points in a geometrical plane. If there exists a rectangle whose four vertices are among those points and ev 阅读全文
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Problem C Problem Description Definite an operation work(Q,x) as sequence Q from the first number on,keep the top x numbers and delete followed x numb 阅读全文