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这道题大家都是怎么做的我是这么想的, 把每次测量天平light的那边的元素集合取交集, 然后和even的集合取补集, 对于heavy那边也是这样, 最后这两个集合中必然只有一个非空, 且含有一个元素(因为题目保证有解) Followed by: Post your reply here: |
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