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Please Help [LCM related Problem]
By Muhammad_mhs, history, 4 years ago, In English

In this problem, I have to find sum of all pairs lcm of an array. I find this from morass blog.Can anyone explain it. Thanks in advance.

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4 years ago, # |
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https://proofwiki.org/wiki/GCD_and_LCM_Distribute_Over_Each_Other

Using this property, you can solve it with prefix gcd. I think this is an efficient way. it can be solved in o(n) now. You can study the blogs written about the problem "Orac and LCM". This may help you

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    4 years ago, # ^ |
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    You need to read the problem again I guess!!

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