chefina and prefix suffix(CHEFPSA) : Codechef Jan 2020 Long Challenge

In this video we are to solve the “Chefina and prefic suffix” problem from codechef jan 2020 long challenge.

This was 5th problem in the DIV2 in this long challenge.
This problem requires the basic knowledge of combinatorics and prefix and suffix series , these concepts are enough to solve this problem.

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problem link :
solution link :

Thank you guys for watching and keep coding.

Post Author: hatefull