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终于过了

Posted by ocean123 at 2008-11-18 13:04:39 on Problem 1230 and last updated at 2008-11-18 13:07:03
一行中可能有多道墙

而且同一行中的多道墙可能会连在一起

连在一起的不能当作一道墙看

要看成多道墙,因此不要只用1来标志墙,而要用不同的数字标志墙,1,2,3,4......

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