n=int(input())
ns=list(map(int,input().split()))
ans={0}
dp=[[-1]*(n+1) for i in range(n+1)]
dp[0][0]=0

for i in range(n):
    for j in range(n):
        if dp[i][j] != -1:
            dp[i+1][j+1] = dp[i][j] ^ ns[j]
            dp[i][j+1] = dp[i][j]
            ans.add(dp[i][j] ^ ns[j])
print(len(ans))