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Give you a lot of positive integers, just to find out how many prime numbers there are. Input There are a lot of cases. In each case, there is an inte 阅读全文
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After the 32nd ACM/ICPC regional contest, Wiskey is beginning to prepare for CET-6. He has an English words table and read it every morning. One day, 阅读全文
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We once did a lot of recursional problem . I think some of them is easy for you and some if hard for you. Now there is a very easy problem . I think y 阅读全文
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Mickey is interested in probability recently. One day , he played a game which is about probability with mini.First mickey gives a letter and a word t 阅读全文
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In this problem you need to make a multiply table of N * N ,just like the sample out. The element in the i th row and j th column should be the produc 阅读全文
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Do you like playing basketball ? If you are , you may know the NBA Skills Challenge . It is the content of the basketball skills . It include several 阅读全文