N = int(input())
A = list(map(int,input().split()))

ans = 0
for j in range(61):
    mask = 1 << j
    m = -1
    for i in range(N):
        if A[i] & mask:
            if m == -1:
                m = A[i]
                A[i] = 0
                ans += 1
            else:
                A[i] ^= m
print(2 ** ans)