Here are the video solutions in the form of a post-contest discussion for problems A, B, C, D of Codechef Starters 124 (Div 2). The live discussion was done with students of TLE Eliminators, this is the recording of the same. We hope this will be useful for you in up-solving this contest.
Solution Codes:
Problem A : https://ideone.com/MnKZOK
Problem B : https://ideone.com/zGCnlk
Problem C : https://ideone.com/zP171v
Problem D : https://ideone.com/ibptW9
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Timestamps:-
0:00 Problem A
6:05 Problem B
20:45 Problem C
39:50 Problem D