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There is a company that has N employees(numbered from 1 to N),every employee in the company has a immediate boss (except for the leader of whole compa 阅读全文
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CC always becomes very depressed at the end of this month, he has checked his credit card yesterday, without any surprise, there are only 99.9 yuan le 阅读全文
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Jack knows that there is a great underground treasury in a secret region. And he has a special device that can be used to detect treasury under the su 阅读全文
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After an uphill battle, General Li won a great victory. Now the head of state decide to reward him with honor and treasures for his great exploit. One 阅读全文
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2012 If this is the end of the world how to do? I do not know how. But now scientists have found that some stars, who can live, but some people do not 阅读全文
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In the kingdom of Henryy, there are N (2 <= N <= 200) cities, with M (M <= 30000) one-way roads connecting them. You are lucky enough to have a chance 阅读全文
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Give you a string with length N, you can generate N strings by left shifts. For example let consider the string “SKYLONG”, we can generate seven strin 阅读全文
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If you solved problem like this, forget it.Because you need to use a completely different algorithm to solve the following one.Kakuro puzzle is played 阅读全文
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It is well known that AekdyCoin is good at string problems as well as number theory problems. When given a string s, we can write down all the non-emp 阅读全文
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One day, sailormoon girls are so delighted that they intend to research about palindromic strings. Operation contains two steps:First step: girls will 阅读全文
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All members of Hulafly love playing the famous network game called 'Lou 1 Zhuang' so much that Super Da Lord got mad with them. So he thought over and 阅读全文
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There are many trees forming a m * n grid, the grid starts from (1,1). Farmer Sherlock is standing at (0,0) point. He wonders how many trees he can se 阅读全文
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Given an N*N matrix with each entry equal to 0 or 1. You can swap any two rows or any two columns. Can you find a way to make all the diagonal entries 阅读全文
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Your platoon of wandering lizards has entered a strange room in the labyrinth you are exploring. As you are looking around for hidden treasures, one o 阅读全文
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