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一道难倒清华大学生的小学生问题...... |
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点评
答案大于200的,我新开了一贴:http://www.dkj1997.com/forum.php?mod=viewthread&tid=13373&page=1&extra=
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点评
小心直觉陷阱http://www.dkj1997.com/forum.php?mod=viewthread&tid=13373
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