Hello codeforces community.

I was trying to solve question 234C from codeforces round #145 and I could not come up with a scheme/way to solve it. So I tried looking for the editorials for this round but could not find it. Also, I looked at successful submission but could not understand the intended solution for this problem.

It would help me if you could share your approach on how you would solve this problem.

Thank You.