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真锻炼眼力！！！

Posted by 200593141 at 2008-01-09 12:44:29 on Problem 2159
In Reply To:why??两个有区别吗???? Posted by:fjnu105042003001 at 2006-07-12 15:41:55 
统计字符的时候错了， 两个都用了C1
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