#include<iostream>
#include<vector>
#include<set>
#include<algorithm>
using namespace std;
using ll = long long;

int main(void){
  int n; cin >> n;
  vector<int> a(n);
  for(auto&x:a) cin >> x;
  int ans=-1, sum=0;
  auto judge=[&](int x){
    int c=0, now=0;
    for(int i=0; i<n; i++){
      now+=a[i];
      if(now>x) return -1;
      if(now==x) c++, now=0;
    }
    if(now) return -1;
    return c;
  };
  for(int i=0; i<n; i++){
    sum+=a[i];
    int x=judge(sum);
    if(x!=-1) ans=max(ans, x);
  }
  cout << ans << endl;
  return 0; 
}