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这个前面有讨论

Posted by kicc at 2005-02-27 19:35:03 on Problem 2232
In Reply To:请问这个题目怎么做 Posted by:tmpbt at 2005-02-27 18:58:15 
"如果有一种或三种就是n,如果有两种就是强的那种的数量"  －－tn
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