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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 on Problem 1860
In Reply To:每个exchange point只能使用一次 怎么可能YES呢 Posted by:ziqilau at 2008-09-05 14:55:17 
可以在 2 3处循环兑换，从而不断进行增值 所以就是YES了
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