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

    for i in range(N):
        a = A[i]
        if a:
            for j in range(i + 1, N):
                if A[j] & a == a:
                    A[j] ^= a

    print(1 << sum(1 for a in A if a))


def main():
    solve()


if __name__ == '__main__':
    main()