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Description Ari the monster always wakes up very early with the first ray of the sun and the first thing she does is feeding her squirrel. Ari draws a 阅读全文
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Description Galois is one of the strongest chess players of Byteforces. He has even invented a new variant of chess, which he named «PawnChess». This 阅读全文
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Description Vasya has n days of vacations! So he decided to improve his IT skills and do sport. Vasya knows the following information about each of th 阅读全文
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Description You are given a description of a depot. It is a rectangular checkered field of n × m size. Each cell in a field can be empty (".") or it c 阅读全文
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Description There will be a launch of a new, powerful and unusual collider very soon, which located along a straight line. n particles will be launche 阅读全文