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Re:是啊。负环没经过S也能过！！！In Reply To:Re:是啊。负环没经过S也能过！！！ Posted by:BloodElf at 2009-04-13 15:35:31 > 只有有负环就能过吧？可以在负环上走n次拿到正无穷钱后在走回s，不就赚了。 注意楼上的数据e21=0.0，也就是说根本不可能兑换回第一种货币！这数据够阴的，如果出这数据不知多少人会WA了。题目加上“汇率大于0”会简单一些。 Followed by:
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