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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
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For each list of words, output a line with each word reversed without changing the order of the words. This problem contains multiple test cases! The 阅读全文
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Prime Number Definition An integer greater than one is called a prime number if its only positive divisors (factors) are one and itself. For instance, 阅读全文