Given an integer N, find how many pairs (A, B) are there such that: gcd(A, B) = A xor B where 1 ≤ B ≤ A ≤ N & 1 ≤ N ≤ 30000000 how can i solve it ? any hint would be helpful thanks in advance :)
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Can you provide a link to the problem?
here
See this and for code refer to this