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Re:Switch in the i-th intersection is initially pointing in the direction of the first intersection listed.

Posted by SGDQ111 at 2015-11-17 19:35:47 on Problem 1847
In Reply To:Switch in the i-th intersection is initially pointing in the direction of the first intersection listed. Posted by:lymyfz at 2011-11-23 11:31:10
> 关键就是这句话!!!!!
同中枪,就是表示第一个不需要换车,后面的要换一次车

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