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#include <bits/stdc++.h>
using namespace std;
using ind = long long;
using cind = const ind;
#define FOR(i,l,r) for(int i = (l); i <= (r); i++)
#define FORD(i,l,r) for(int i = (l); i >= (r); i--)

ind a[500'001];
ind v[500'001];
int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    ind N;
    cin >> N;
    FOR(i,1,N) cin >> a[i];
    ind sum = 0;
    FOR(i,1,N) sum += a[i];
    FORD(k,N,1) if(sum % k == 0){
        FOR(i,1,N+k) v[i] = 0;
        ind current=0;
        FOR(i,1,N+k){
            current -= v[i];
            if(current > a[i]) goto next_k;
            v[i+k] += a[i] - current;
            current = a[i];
        }
        cout << k << '\n';
        return 0;
        next_k: continue;
    }
}