12744 - Just Some Permutations - 2

All about problems in Volume 127. If there is a thread about your problem, please use it. If not, create one with its number in the subject.

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faiyaz26
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Re: 12744 - Just Some Permutations - 2

Post by faiyaz26 » Sat Nov 08, 2014 2:44 am

How to solve this problem ?

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