abhikolar1512's blog

Coprime pairs.
By abhikolar1512, history, 6 years ago, In English

Suppose we are given an Array A of size N (N<=100000) and each element of array A[i]<=100000. Now I want to find index of rightmost element 'j' in subarray A[1]....A[i-1] for each A[i] such that gcd(A[j],A[i]) is 1 i.e. both are relatively comprime. How can this be done efficiently?

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6 years ago, # |
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Can you give me Problem link.

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6 years ago, # |
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a similar problem was given at CEOI 2016, there's an explanation to that problem here http://codeforces.com/blog/entry/46120

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6 years ago, # |
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I think this problem appeared in a recent contest. Can you provide the link ?

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