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A. Visiting a Friend A. Visiting a Friend Pig is visiting a friend. Pig's house is located at point 0, and his friend's house is located at point m on 阅读全文
posted @ 2018-01-03 14:34
starry_sky
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摘要：
D. Shovel Sale There are n shovels in Polycarp's shop. The i-th shovel costs i burles, that is, the first shovel costs 1 burle, the second shovel cost 阅读全文
posted @ 2018-01-03 13:15
starry_sky
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