Can anyone explain this solution of this question please explain in simple words

Правка en1, от hackersarkar12, 2020-07-09 16:47:40

Here is the link https://codeforces.net/contest/1000/problem/C I saw the editorial but cannot understand please explain the solution of this question.

Теги #newbie, #new, 1700

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en1 Английский hackersarkar12 2020-07-09 16:47:40 234 Initial revision (published)