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A Sum Of Bitwise Xor Problem
Given an array A consist of N integers (N <= 100000, 0 <= Ai <= sqrt(i) for 1 <= i <= N). Count the number of triple (i, j, k) such that i <= j <= k and (Ai xor Aj xor Ak) = 0.
I tried many approaches but I couldn't optimize my O(N^2) solution. Is there any efficient algorithm to solve this problem?
