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弱弱的问::: They do not want to enter any towns, because of the traffic..该怎么理解??不穿过城镇,,示例中 9城的会员是如何到达题目中的最佳区域???? 如果允许穿过城镇,,,是不是每个会员最多穿过一堵墙就能到达要求的区域...这样的话,似乎就没意思了... 谢谢指点.. Followed by:
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