Brassica_的菜园

链接http://acm.hdu.edu.cn/showproblem.php?pid=6059题意给出A[1..n],(1<=∑n<=5∗105,0<=A[i]<230)A[1..n], (1 <= \sum n <= 5 * 10^5, 0 <= A[i] < 2 ^ {30})，要求统计三元组(i,j,k)(i, j, k)的个数使其满足i<j<ki < j < k并且(A[i]xorA[j]