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E. ZS and The Birthday Paradox 题目连接： http://www.codeforces.com/contest/711/problem/E Description ZS the Coder has recently found an interesting concep 阅读全文
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D. Directed Roads 题目连接： http://www.codeforces.com/contest/711/problem/D Description ZS the Coder and Chris the Baboon has explored Udayland for quite 阅读全文
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C. Coloring Trees 题目连接： http://www.codeforces.com/contest/711/problem/C Description ZS the Coder and Chris the Baboon has arrived at Udayland! They wa 阅读全文
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B. Chris and Magic Square 题目连接： http://www.codeforces.com/contest/711/problem/B Description ZS the Coder and Chris the Baboon arrived at the entrance 阅读全文
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A. Bus to Udayland 题目连接： http://www.codeforces.com/contest/711/problem/A Description ZS the Coder and Chris the Baboon are travelling to Udayland! To 阅读全文