ZCO17002 Optimization Problem

I am getting SIGABRT or SIGSEGV or TLE for this problem. Any idea on how I can improve my solution. I have looked through other people’s solutions but I couldn’t understand them. So please any suggestions.
Problem Link : https://www.codechef.com/ZCOPRAC/problems/ZCO17002
My Solution : https://www.codechef.com/viewsolution/27482249

You might find this helpful. Also, please search for the editorials of zco/inoi problems (or any problem in that matter) and post your doubts in the comments section below the editorial. For zco/inoi problems you can always ping me for any help.

Thank you very much, I was unaware of the editorials for the ZCO problems.