N = int(input())
A = list(map(int,input().split()))

C = 1 << 15
dp = [0] * (C + 1)
dp[0] = 1
for a in A:
    nx = dp.copy()
    for i in range(C+1):
        if dp[i]:
            nx[i^a] = 1
    dp = nx
print(sum(dp))