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D. Maxim and Array 题目连接： http://codeforces.com/contest/721/problem/D Description Recently Maxim has found an array of n integers, needed by no one. He 阅读全文
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C. Journey 题目连接： http://codeforces.com/contest/721/problem/C Description Recently Irina arrived to one of the most famous cities of Berland — the Berl 阅读全文
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B. Passwords 题目连接： http://codeforces.com/contest/721/problem/B Description Vanya is managed to enter his favourite site Codehorses. Vanya uses n disti 阅读全文
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A. One dimensional Japanese Crossword 题目连接： http://codeforces.com/contest/721/problem/A Description Recently Adaltik discovered japanese crosswords. J 阅读全文