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

#define rep(i, a, b) for (int i = (a); i < (b); i++)
#define all(x) begin(x), end(x)
#define sz(x) int((x).size())
using ll = long long;
using pii = pair<int, int>;
using vi = vector<int>;

#ifdef LOCAL
auto operator<<(auto& o, auto x) -> decltype(x.first, o);
auto operator<<(auto& o, auto x) -> decltype(x.end(), o) {
  o << "{";
  for (int i = 0; auto y : x) o << ", " + !i++ * 2 << y;
  return o << "}"; }
auto operator<<(auto& o, auto x) -> decltype(x.first, o) {
  return o << "(" << x.first << ", " << x.second << ")"; }
void __print(auto... x) { ((cerr << x << " "), ...) << endl; }
#define debug(x...) __print("[" #x "]:", x)
#else
#define debug(...) 2137
#endif

const int N = 100100;
int n;
int a[N];
int b[N];

bool spr(int x) {
  b[0] = a[0];
  ll suma = b[0];
  rep(i, 1, n) {
    if (i >= x) suma -= b[i - x];
    if (a[i] < suma) return 0;
    b[i] = a[i] - suma;
    if (b[i] && i + x > n) return 0;
    suma += b[i];
  }
  return 1;
}

int main() {
  cin.tie(0)->sync_with_stdio(0);
  cin >> n;
  ll suma = 0;
  rep(i, 0, n) {
    cin >> a[i];
    suma += a[i];
  }
  int odp = n;
  while (suma % odp != 0 || !spr(odp)) odp--;
  cout << odp << '\n';
}