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/******************************************************************************

                              Online C++ Compiler.
               Code, Compile, Run and Debug C++ program online.
Write your code in this editor and press "Run" button to compile and execute it.

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

vector<int> a;

bool sprawdz(int k, int n2){
    vector<long long> diff(n2 + 2, 0);
    long long cur = 0;
    for(int i = 1; i <= n2; i++){
        cur += diff[i];
        if(cur > a[i]){
            return false;
        }

        long long po = 1LL * a[i] - cur;
        if(po > 0){
            if(i + k - 1 > n2){
                return false;    
            }
            cur += po;
            diff[i + k] -= po;
        }
    }
    return true;
}

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

    long long n;
    cin >> n;

    a.resize(n + 1);
    long long s = 0;
    for(int i = 1; i <= n; i++){
        cin >> a[i];
        s += a[i];
    }

    vector<long long> dzielniki;
    for(long long d = 1; d * d <= s; d++){
        if(s % d == 0){
            dzielniki.push_back(d);
            if(d * d != s){
                dzielniki.push_back(s / d);
            }
        }
    }

    sort(dzielniki.rbegin(), dzielniki.rend());

    for(long long k : dzielniki){
        if(k > n){ 
            continue;
        }
        if(sprawdz(k, n)){
            cout << k << endl;
            return 0;
        }
    }

    return 0;
}