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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Время на сервере: 25.04.2024 01:55:16 (k1).
Десктопная версия, переключиться на мобильную.
При поддержке
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
You need to read the problem again I guess!!