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Re:为什么拆牛就对了,拆食物就错了

Posted by 962861784 at 2011-06-20 10:42:48 on Problem 3281
In Reply To:为什么拆牛就对了,拆食物就错了 Posted by:longmenwaideyu at 2011-06-02 14:12:02
将一头牛拆为两头,其中一头和它喜欢的食物相连,另一头和它喜欢的饮料相连,两头牛之间相连;
这样可以保证每头牛只能选一种食物和饮料.

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