//
// A.cpp
// torelax
//
// Created by Rakhman on 1/5/21.
//
#include <cstring>
#include <vector>
#include <list>
#include <map>
#include <set>
#include <deque>
#include <stack>
#include <bitset>
#include <algorithm>
#include <functional>
#include <numeric>
#include <utility>
#include <sstream>
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <queue>
#include <cmath>
#include <cstdlib>
#include <ctime>
#include <cassert>
#include <iterator>
#define ios ios_base::sync_with_stdio(0), cout.tie(0), cin.tie(0);
#define S second
#define F first
#define pb push_back
#define nl '\n'
#define NL cout << '\n';
#define EX exit(0)
#define all(s) s.begin(), s.end()
#define no_answer {cout << "NO"; exit(0);}
#define FOR(i, start, finish, k) for(llong i = start; i <= finish; i += k)
const long long mxn = 1e6 + 110;
const long long mnn = 3e3 + 2;
const long long mod = 1e9 + 7;
const long long inf = 1e18;
const long long OO = 1e9 + 100;
typedef long long llong;
typedef unsigned long long ullong;
using namespace std;
llong n, b[mxn], pr[mxn], mx[mxn], dp[mxn];
int main() {
cin >> n;
for(int i = 1; i <= n; i++){
cin >> b[i];
pr[i] = pr[i - 1] + b[i];
}
for(int i = 1; i <= n; i++){
for(int k = i - 1; k >= 0; k--) {
if(pr[i] - pr[k] >= mx[k]) {
dp[i] = dp[k] + 1;
mx[i] = pr[i] - pr[k];
break;
}
}
}
cout << dp[n];
}
