Help Needed for Topcoder SRM 800 Div2 400 points problem

Revision en1, by The_mysterio, 2021-02-14 18:42:42

Can anyone kindly elaborate the solution of topcoder srm 800 div 2 400 pointer problem?? Topcoder has not yet released any editorials and so I am having a hard time trying to figure out the solution Thanks in advance...

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en1 English The_mysterio 2021-02-14 18:42:42 276 Initial revision (published)