#yuki_184

n=int(raw_input())
a=map(int,raw_input().split())
res=0
for i in xrange(n):
 if a[i]:
  res+=1
  x=0
  while (2**(x+1))<=a[i]:
   x+=1
  for y in xrange(i+1,n):
   if a[y] & (2**x):
    a[y]^=a[i]
print 2**res