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

def Gauss(M):
    rank = 0
    for d in range(61):
        pivot = -1
        for i in range(rank, len(M)):
            if M[i] & (1<<d):
                pivot = i
                break
        if pivot == -1:
            continue
        M[rank], M[pivot] = M[pivot], M[rank]
        for j in range(0, len(M)):
            if j == rank:
                continue
            if not (M[j] & (1<<d)):
                continue
            M[j] ^= M[rank]
        rank += 1
    return rank

rank = Gauss(A)
print(pow(2, rank))