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While doing some spring cleaning, Daniel found an old calculator that he loves so much. However, it seems ... 阅读全文
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Shichikuji is the new resident deity of the South Black Snail Temple. Her first job is as follows:There ar... 阅读全文
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Codeforces Round #597 (Div. 2) Constanze is the smartest girl in her village but she has bad eyesight.On... 阅读全文
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Codeforces Round #597 (Div. 2)Let nn be a positive integer. Let a,b,ca,b,c be nonnegative integers such th... 阅读全文
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Codeforces Round #597 (Div. 2 Consider the set of all nonnegative integers: 0,1,2,…. Given two integers a... 阅读全文