N = int(input())
A = [int(a) for a in input().split()]

M = 2**15
dp = [[False]*2 for _ in range(M)]
dp[0][0] = True
for i in range(N):
    for j in range(M):
        if dp[j][i%2]:
            dp[j][(i+1)%2] = True
            dp[j^A[i]][(i+1)%2] = True

ans = 0
for i in range(M):
    if dp[i][N%2]:
        ans += 1
print(ans)