N = int(input())
A = list(map(int,input().split()))
cnt = 0
for i in reversed(range(61)):
    B = []
    tp = 1 << i
    A = sorted(list(set(A)))
    if A and (A[-1] >= tp):
        cnt += 1
        a = A.pop()
    while A and (A[-1] >= tp):
        x = A.pop() ^ a
        B.append(x)
    A += B
print(pow(2,cnt))