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Nov 2, 2019 at 14:59 vote accept user3760100
Nov 2, 2019 at 11:14 history edited Steven CC BY-SA 4.0
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Nov 2, 2019 at 11:13 comment added Steven Ughh. You are right! Thanks for spotting that.
Nov 2, 2019 at 11:07 comment added Vimal Patel No doubt this is a great answer as per me. But, I think we should consider $x$ as majority of $sign(a_1-a_n), sign(a_2-a_1)$ and $sign(a_3 - a_2)$. Because I'm getting wrong answer if I follow above approach with sequence $6,3,4,5$.
Nov 2, 2019 at 10:42 history answered Steven CC BY-SA 4.0