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The map of Berland is a rectangle of the size n × m, which consists of cells of size 1 × 1. Each cell is either land or water. The map is surrounded b 阅读全文
posted @ 2016-10-04 00:08
ACforever
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Polycarp is a music editor at the radio station. He received a playlist for tomorrow, that can be represented as a sequence a1, a2, ..., an, where ai 阅读全文
posted @ 2016-10-04 00:05
ACforever
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Modern text editors usually show some information regarding the document being edited. For example, the number of words, the number of pages, or the n 阅读全文
posted @ 2016-10-04 00:01
ACforever
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There are three friend living on the straight line Ox in Lineland. The first friend lives at the point x1, the second friend lives at the pointx2, and 阅读全文
posted @ 2016-10-04 00:00
ACforever
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