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**解析**:
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## 6. 过河
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> **题目**: 有A、B、C、D四个人,要在夜里过一座桥。他们通过这座桥分别需要耗时1、2、5、10分钟,只有一支手电筒,并且同时最多只能两个人一起过桥. 请问,最短需要几分钟四人都能过桥?
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# 参考(copy)
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1. https://blog.csdn.net/linjcai/article/details/80868385
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2. https://www.julyedu.com/question/select/kp_id/1
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3. https://www.cnblogs.com/pang951189/p/7439670.html
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3. https://www.cnblogs.com/pang951189/p/7439670.html

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