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Re:不明白题意

Posted by 470923988 at 2007-11-14 16:47:48 on Problem 1230
In Reply To:不明白题意 Posted by:470923988 at 2007-11-14 16:46:00
 谁能讲讲题意?是只沿着给定的一列从上走到下?还是要经过所有的列从上走到下?

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