Given an array of length n (n<= 5*10^5) and a number k (k<=10^3), We need to count number of pairs in array whose bitwise and is greater than k. Please share your approach, as I am not able to think the effiecient solution.
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Isn't this the classic trie data structure problem?
I appreciate at least you tried to share some knowledge on this topic but suppose you asked a problem and someone replied that isn't it a classical FFT problem, same sounds to me but I will be glad if u can share the link if this is a classical trie ds problem because I was not able to find this on google.
There's a very similar problem here and here.