Please provide better explanation of 449 D than that available in the editorial!

Revision en1, by thegodfather, 2015-10-17 20:58:28

Can anyone of you please provide some better explanation of http://codeforces.net/contest/449/problem/D than the explanation given in the editorial (http://codeforces.net/blog/entry/13112). I am new to such stuff so I am not good at grasping the concepts as other smart people are.

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en1 English thegodfather 2015-10-17 20:58:28 361 Initial revision (published)