#include <iostream>
#include <vector>

using namespace std;
struct tt{
    int l, r;
};

int main()
{
    int n, i, j, z;
    long long sum = 0, ans = 0;
    cin >> n;
    vector <int> a(n);
    for ( i = 0; i < n; i++)
        cin >> a[i];
    for ( i = 0; i < n; i++){
        sum = a[i];
        j = i + 1;
        z = 1;
        while (sum > 0 && z <= n){
            sum += a[j];
            z++;
            j = (j + 1) % n;
            //cout << a[i] << " " << sum << endl;
        }
        if (!(z == n && sum < 0) && !(z < n)){
            ans++;
            //cout << i << endl;
        }
    }
    cout << ans << endl;
    return 0;
}