#include <bits/stdc++.h>
using namespace std;
#define int long long 
int n; 
int v[500005], dp[500005];
signed main() {
  ios::sync_with_stdio(0); cin.tie(0);
  cin >> n;
  for (int i=1; i<=n; ++i) {
    cin >> v[i];
  }
  
  
  int bfr = v[1], cnt = 1; 
  dp[1] = 1;
  for (int i=2; i<=n; ++i) {
    int cur = v[i], now = i;
    for (int j=i-1; j > 0; --j) {
      if (cur >= bfr) break;
      cur += v[j];
      now = j;
    }
    
    dp[i] = dp[now-1] + 1;
  }
  
  // for (int i=0; i<=n; ++i) {
  //   cout << dp[i] << " ";
  // }
  cout << dp[n];
}
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