n = int(input())
a = list(map(int, input().split()))
s = [0]
for i in range(n):
    if a[i] not in s:
        s.append(a[i])
    for j in range(len(s)):
        if a[i] ^ s[j] not in s:
            s.append(a[i] ^ s[j])

print(len(s))