Editorial request for BFF'S- CODEJAM

I have problem solving a problem from codejam round 1A-

Link to problem:- https://code.google.com/codejam/contest/4304486/dashboard#s=p2

Can anyone please write editorial to this problem and please tell whats the strategy to approach to solve this kind of problem.

Any help would be appreciated, thanks in advance.

There is an editorial already : Editorial

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