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#ifdef LOC
#include "debuglib.hpp"
#else
#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
#define deb(...)
#define DBP(...)
#endif
using namespace std;
using   ll         = long long;
using   vi         = vector<int>;
using   pii        = pair<int, int>;
#define pb           push_back
#define mp           make_pair
#define x            first
#define y            second
#define rep(i, b, e) for (int i = (b); i < (e); i++)
#define each(a, x)   for (auto& a : (x))
#define all(x)       (x).begin(), (x).end()
#define sz(x)        int((x).size())

int main() {
	cin.sync_with_stdio(0); cin.tie(0);
	int n; cin >> n;
	vector<ll> a(n);
	each(e, a) cin >> e;

	vector<ll> tmp(n);
	ll sum = accumulate(all(a), 0LL);

	for (int k = n; k > 0; k--) {
		if (sum%k != 0) continue;

		bool ok = 1;
		ll cur = 0;

		rep(i, 0, n) {
			if (a[i] < cur) {
				ok = 0;
				break;
			}
			tmp[i] = a[i] - cur;
			cur = a[i];
			if (i >= k-1) cur -= tmp[i-k+1];
		}

		if (ok && cur == 0) {
			cout << k << '\n';
			return 0;
		}
	}
}