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Re:这句话是什么意思？？

Posted by wangfengtian at 2009-10-05 18:13:09 on Problem 3126
In Reply To:这句话是什么意思？？ Posted by:scaneeling at 2009-02-11 16:22:32

> Note that the digit 1 which got pasted over in step 2 can not be reused in the last step – a new 1 must be purchased.
> 什么意思，是说上一步变换用到了1下一步就不能再用1了么，刚开始我这样考虑了，可是WA，去掉不考虑却能AC，这话到底什么意思？不明白。。。
直白点意思是被盖住的1就不能使用了，要用就还得掏钱，

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