M = 2**15
N = int(input())
A = list(map(int,input().split()))
DP = [[0] * (M+1) for _ in range(N+1)]
DP[0][0] = 1
for i in range(N):
    for j in range(M+1):
        if DP[i][j]:
            DP[i+1][j] = 1
            DP[i+1][j^A[i]] = 1
print(sum(DP[N]))