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Re:每个exchange point只能使用一次 怎么可能YES呢

Posted by chhaya at 2009-10-08 21:19:34 on Problem 1860
In Reply To:Re:每个exchange point只能使用一次 怎么可能YES呢 Posted by:zhzz at 2008-10-01 16:34:37 
> 可以在 2 3处循环兑换，从而不断进行增值 所以就是YES了
他说每个exchange point只能用一次，怎么可以循环兑换呢？
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