import sys

int1 = lambda x: int(x) - 1

# input = lambda: sys.stdin.buffer.readline()
input = lambda: sys.stdin.readline().rstrip()
ii = lambda: int(input())
i1 = lambda: int1(input())
mi = lambda: map(int, input().split())
mi1 = lambda: map(int1, input().split())
li = lambda: list(mi())
li1 = lambda: list(mi1())
lli = lambda n: [li() for _ in range(n)]

INF = float("inf")
mod = int(1e9 + 7)
# mod = 998244353

n = ii()
a = li()
rank = 0
col = 61
for j in range(col - 1, -1, -1):
    idx = -1
    for i in range(rank, n):
        if a[i] >> j & 1:
            idx = i
            break
    if idx != -1:
        a[rank], a[idx] = a[idx], a[rank]
        for i in range(n):
            if i != rank and a[i] >> j & 1:
                a[i] ^= a[rank]
        rank += 1
print(2 ** rank)