Not able to understand the editorial for a problem.

Revision en1, by skill_Issued, 2024-04-25 22:49:44

I am currently solving this Problem and I am not able to understand its editorial. Can someone explain it to me in simpler words ?

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  Rev. Lang. By When Δ Comment
en2 English skill_Issued 2024-04-25 22:52:05 130
en1 English skill_Issued 2024-04-25 22:49:44 276 Initial revision (published)