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证明很简单一种取牛方法相当于一个排序，在这个序列中只要有相邻两头牛顺序与比值关系搞反，就可以通过对调这两头牛来得到一个更优解，所以说只有全部按照比值关系的排序才是最优解。 Followed by: Post your reply here: |
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