#include<bits/stdc++.h>
using namespace std;
#pragma GCC optimize ("unroll-loops,Ofast,O3")
#pragma GCC target("avx,avx2,fma")
#define F first
#define S second
#define sz(x) (int)x.size()
#define pb push_back
#define eb emplace_back
#define all(x) (x).begin(),(x).end()
const int E = 5e5+777;
const long long inf = 1e18+777;
const int N = 3e3+777;
const int MOD = 1e9+7;
int n, a[E], pref[E], dp[N][N];
int get(int l, int r){
return pref[r] - pref[l-1];
}
int main(){
ios_base::sync_with_stdio(0),
cin.tie(0),cout.tie(0);
cin >> n;
for(int i = 1; i <= n; ++i){
cin >> a[i];
pref[i] = pref[i-1] + a[i];
}
for(int len = 1; len <= n; ++len){
for(int l = 1, r = len; r <= n; ++r, ++l){
if(l == 1 && r == 1){
dp[l][r] = 1; continue;
}
for(int l1 = 0; l1 < l; ++l1){
for(int r1 = l1; r1 < l; ++r1){
if(get(l1, r1) <= get(l, r)){
dp[l][r] = max(dp[l][r], dp[l1][r1]);
}
}
}
if(dp[l][r]) ++dp[l][r];
}
}
// for(int i = 1; i <= n; ++i){
// for(int j = i; j <= n; ++j){
// cout << "{" << i << "," << j << "}: " << dp[i][j] << '\n';
// }
// }
int res = 0;
for(int i = 1; i <= n; ++i){
res = max(res, dp[i][n]);
}
cout << res;
}
