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E. Correcting MistakesTime Limit: 20 SecMemory Limit: 256 MB题目连接http://codeforces.com/problemset/problem/533/EDescriptionAnalyzing the mistakes people... 阅读全文
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常见优化单调队列形式dp[i]=min{f(k)}dp[i]=max{f(k)}要求f(k)是关于k的函数k的范围和i有关转移方法维护一个单调递增(减)的队列，可以在两头弹出元素，一头压入元素。队列中维护的是两个值。一个是位置，这和k的范围有关系，另外一个是f(k)的值，这个用来维护单调性，当然如果... 阅读全文
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B. Prison TransferTime Limit: 20 SecMemory Limit: 256 MB题目连接http://codeforces.com/problemset/problem/427/BDescriptionThe prison of your city has n pri... 阅读全文
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E. Ann and Half-PalindromeTime Limit: 20 SecMemory Limit: 256 MB题目连接http://codeforces.com/contest/557/problem/EDescriptionTomorrow Ann takes the harde... 阅读全文
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D. Vitaly and CycleTime Limit: 20 SecMemory Limit: 256 MB题目连接http://codeforces.com/contest/557/problem/DDescriptionAfter Vitaly was expelled from the ... 阅读全文
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C. Arthur and TableTime Limit: 20 SecMemory Limit: 256 MB题目连接http://codeforces.com/contest/557/problem/CDescriptionArthur has bought a beautiful big t... 阅读全文
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B. Pasha and TeaTime Limit: 20 SecMemory Limit: 256 MB题目连接http://codeforces.com/contest/557/problem/BDescriptionPasha decided to invite his friends to... 阅读全文
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A. Ilya and DiplomasTime Limit: 20 SecMemory Limit: 256 MB题目连接http://codeforces.com/contest/557/problem/ADescriptionSoon a school Olympiad in Informat... 阅读全文