N = int(input())
dp = [[False] * (2 ** 15) for i in range(N)]
A = list(map(int, input().split()))
dp[0][0] = True
dp[0][A[0]] = True
for i in range(1, N):
    for j in range(2 ** 15):
        dp[i][j] |= dp[i - 1][j]
        dp[i][j ^ A[i]] |= dp[i - 1][j]
ans = 0
for i in range(2 ** 15):
    if dp[-1][i]:
        ans += 1
print(ans)