Help needed in following problem

Revision en1, by parth015, 2016-09-15 13:19:41

Hello everyone, I needed help in following problem. From editorial it is not clear. Link of problem is[](http://codeforces.me/contest/165/problem/C)

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en2 English parth015 2016-09-15 13:20:01 2 Tiny change: 'problem is[](http://co' -> 'problem is(http://co'
en1 English parth015 2016-09-15 13:19:41 183 Initial revision (published)