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$\begingroup$ I think this is a misunderstanding of the question (which is understandable, as I found the question is not so easy to understand). We've got an array here, and the conditions are that $A[i] \le 2 A[j]$ for all $i,j$ with $|i-j|\le k$. That's not the same as what you wrote in the first line. In other words, the indices must differ by at most $k$, and the elements at those indices must differ by at most a factor of two. This answer mixes the two up. $\endgroup$

D.W.
– D.W. ♦

2017-02-01 23:07:23 +00:00
Commented Feb 1, 2017 at 23:07
$\begingroup$ I also read it as "one distance cannot be exactly twice another distance" which again totally changes the algorithm. $\endgroup$

gnasher729
– gnasher729

2017-02-02 00:31:22 +00:00
Commented Feb 2, 2017 at 0:31

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