作者ooopppeeennn (open)
看板Grad-ProbAsk
标题[问题] 可以帮我翻译一下吗?
时间Sat Apr 4 21:15:26 2009
Find the number of r-digit quanternary sequences that comtain an even number
of 0's. The exponential enumerator for the permutation of the digit 0 is
可以帮我翻译一下吗?
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1F:推 fish0835:用指数生成函数去解长度r的4位元字串中,具偶数0的字串数 04/04 21:54