#include <bits/stdc++.h>
#define V vector
#define L(i,j,k) for(int i=(j);i<=(k);i++)
#define R(i,j,k) for(int i=(j);i>=(k);i--)
#define all(x) x.begin(),x.end()
#define sz(a) ((int)a.size())
#define pb push_back
using namespace std;
typedef long long ll;
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
template<typename T>
using indexed_set=tree<T,null_type,less<T>,rb_tree_tag,tree_order_statistics_node_update>;
const int N=5000;
const ll I=1e18;
ll dp[N][N];
void chmin(ll &a, ll b){
a=min(a,b);
}
int main(){
int n;cin>>n;
V<ll>v(n);
L(i,0,n-1)cin>>v[i];
if(n==1){
cout<<0<<endl;
cout<<v[0]<<endl;
return 0;
}
L(i,0,n-1)L(j,0,n-1)dp[i][j]=I;
dp[0][0]=0;
if(v[0]>v[1])dp[1][0]=1;
else dp[1][1]=0;
L(i,2,n-1){
ll f=0;
R(j,i,0){
f+=v[j];
ll s=0;
R(k,j-1,0){
s+=v[k];
if(f>s)chmin(dp[i][j],dp[j-1][k]+(i-j));
}
}
}
ll ans=I;
L(i,0,n-1)chmin(ans,dp[n-1][i]);
cout<<ans+1<<endl;
}
