#include <bits/stdc++.h>
using namespace std;

int main(void) {
    int N;
    cin >> N;
    vector<int> a(N);
    int sum = 0;
    for (int i = 0; i < N; i++) {
        cin >> a[i];
        sum += a[i];
    }

    int ans = -1;
    for (int i = 1; i <= sum; i++) {
        if (sum % i != 0) continue;
        bool ok = true;
        int s = 0;
        for (int j = 0; j < N; j++) {
            s += a[j];
            if (s == i) {
                s = 0;
            } else if (s > i) {
                ok = false;
                break;
            }
        }
        if (ok && s == 0) {
            ans = max(ans, sum / i);
        }
    }
    cout << ans << endl;
    return 0;
}