import sys

sys.setrecursionlimit(10 ** 6)
from bisect import *
from collections import *
from heapq import *

int1 = lambda x: int(x) - 1
p2D = lambda x: print(*x, sep="\n")
def II(): return int(sys.stdin.readline())
def SI(): return sys.stdin.readline()[:-1]
def MI(): return map(int, sys.stdin.readline().split())
def MI1(): return map(int1, sys.stdin.readline().split())
def MF(): return map(float, sys.stdin.readline().split())
def LI(): return list(map(int, sys.stdin.readline().split()))
def LI1(): return list(map(int1, sys.stdin.readline().split()))
def LF(): return list(map(float, sys.stdin.readline().split()))
def LLI(rows_number): return [LI() for _ in range(rows_number)]
dij = [(0, 1), (1, 0), (0, -1), (-1, 0)]

from heapq import *
def main():
    n = II()
    xx = LI()
    xx=set(xx)
    hp=[]
    for x in xx:heappush(hp,-x)
    pre=0
    cnt=0
    while hp:
        x=-heappop(hp)
        if x==0:break
        if x.bit_length()==pre.bit_length():
            heappush(hp,-(x^pre))
        else:
            pre=x
            cnt+=1
    print(pow(2,cnt))

main()