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Re:为什么拆牛就对了,拆食物就错了

Posted by Magic_M at 2011-08-02 23:08:37 on Problem 3281
In Reply To: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
因为一头牛只能选一种食物和饮料。。。
把牛拆了。。中间的容量为1.
这样可以保证它只选一种。。。
如果不拆牛的话不能保证。。。。。

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