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E. Runaway to a Shadow 题目连接： http://www.codeforces.com/contest/681/problem/E Description Dima is living in a dormitory, as well as some cockroaches. A 阅读全文
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D. Gifts by the List 题目连接： http://www.codeforces.com/contest/681/problem/D Description Sasha lives in a big happy family. At the Man's Day all the men 阅读全文
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C. Heap Operations 题目连接： http://www.codeforces.com/contest/681/problem/C Description Petya has recently learned data structure named "Binary heap". Th 阅读全文
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B. Economy Game 题目连接： http://www.codeforces.com/contest/681/problem/B Description Kolya is developing an economy simulator game. His most favourite pa 阅读全文
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A. A Good Contest 题目连接： http://www.codeforces.com/contest/681/problem/A Description Codeforces user' handle color depends on his rating — it is red if 阅读全文