Given an array of integers.find total number of ways to pick two elements say(ai,aj) such that gcd(ai,aj) is not prime. Note: choosing ai,aj is same as choosing aj,ai;
*please suggest solution other that bruteforce.
Given an array of integers.find total number of ways to pick two elements say(ai,aj) such that gcd(ai,aj) is not prime. Note: choosing ai,aj is same as choosing aj,ai;
*please suggest solution other that bruteforce.
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