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按向右转次数加组合计数就可以算出来了

Posted by yu_ at 2009-05-17 23:42:45 on Problem 3731 and last updated at 2009-05-17 23:43:02
In Reply To:请问这题怎么做？ Posted by:ACBoys at 2009-05-17 13:23:57 
> 请问这题怎么做？
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