#include <iostream>
#include <vector>
#include <string>
#include <algorithm>
#include <cstring>
#include <cstdlib>
#include <cmath>
using namespace std;
using ll = long long;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);

    int n;
    cin >> n;

    vector<int> a(n);
    int s = 0;
    for (int i = 0; i < n; i++) {
        cin >> a[i];
        s += a[i];
    }

    vector<bool> b(s);
    s = 0;
    for (int i = 0; i < n; i++) {
        b[s] = true;
        s += a[i];
    }
    
    int r = 0;
    for (int l = 1; l * l <= s; l++) {
        if (s % l == 0) {
            int k = l;
            for (int h = 0; h < 2; h++) {
                int f = 0;
                for (int j = k; j < s; j += k) {
                    if (!b[j]) {
                        f = 1;
                        break;
                    }
                }
                k = s / k;
                if (f == 0) r = max(r, k);
            }
        }
    }

    cout << r << endl;

    return 0;
}