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链接: https://codeforces.com/contest/1215/problem/A 题意: The final match of the Berland Football Cup has been held recently. The referee has shown n yell 阅读全文
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链接: https://vjudge.net/problem/POJ 2778 题意: It's well known that DNA Sequence is a sequence only contains A, C, T and G, and it's very useful to analy 阅读全文
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链接: https://vjudge.net/problem/HDU 3065 题意: 小t非常感谢大家帮忙解决了他的上一个问题。然而病毒侵袭持续中。在小t的不懈努力下，他发现了网路中的“万恶之源”。这是一个庞大的病毒网站，他有着好多好多的病毒，但是这个网站包含的病毒很奇怪，这些病毒的特征码很短，而 阅读全文
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链接: https://vjudge.net/problem/HDU 2896 题意: 当太阳的光辉逐渐被月亮遮蔽，世界失去了光明，大地迎来最黑暗的时刻。。。。在这样的时刻，人们却异常兴奋——我们能在有生之年看到500年一遇的世界奇观，那是多么幸福的事儿啊~~ 但网路上总有那么些网站，开始借着民众的 阅读全文
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链接: https://vjudge.net/problem/HDU 2222 题意: In the modern time, Search engine came into the life of everybody like Google, Baidu, etc. Wiskey also wan 阅读全文
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链接: https://codeforces.com/contest/1241/problem/D 题意: You are given a sequence a1,a2,…,an, consisting of integers. You can apply the following operati 阅读全文
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链接: https://codeforces.com/contest/1241/problem/B 题意: You are given two strings of equal length s and t consisting of lowercase Latin letters. You may 阅读全文
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链接: https://codeforces.com/contest/1241/problem/C 题意: You are an environmental activist at heart but the reality is harsh and you are just a cashier i 阅读全文
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链接: https://codeforces.com/contest/1241/problem/A 题意: Let's denote correct match equation (we will denote it as CME) an equation $$$a + b = c$$$ there 阅读全文