This is the problem (https://codeforces.me/group/wlb0UYQSQF/contest/644248/problem/H)
It was asked last year in indian ICPC mock contests..
I had solved it before! I used the same code, coz why not? Its allowed..
And testcases are weak too, i had by mistakenly ignored all elements greater than N+64, and still got AC!









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Source of the provided problem if we dig even deeper: Link
XXI Open Cup, Grand Prix of Korea, problem H.
However, I believe contest quality was good. Thanks for the authors!
Is your avatar Natsumi? She's so cute
Yes, Natsumi Kyouno