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

ret = 0
for i in range(n):
    if a[i]:
        ret += 1
        x = 0
        while (2**(x+1)) <= a[i]:
            x += 1
        for y in range(i+1, n, 1):
            if a[y] & (2 ** x):
                a[y] ^= a[i]

print(2**ret)