Someone explain me this problem 1223A "CME"

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Someone explain me this problem 1223A "CME"

Difference between en2 and en3, changed 53 character(s)

~~###~~ I am unable to understand the problem please someone explain me in simple terms↵
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[~~CLICK HERE TO GO TO THE PROBLEM~~click here for the problem](https://codeforces.com/problemset/problem/1223/A)↵
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History

Revisions

Rev.	By	When	Δ	Comment
en3	PrasannaBalaji	2020-04-01 17:49:42	53
en2	PrasannaBalaji	2020-04-01 17:09:37	258
en1	PrasannaBalaji	2020-04-01 17:08:24	417	Initial revision (published)