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#include <bits/stdc++.h>
using namespace std;
#define st first
#define nd second
#define PB push_back
#define mp make_pair
#define fastio ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
using ll = long long;
#define mod 1000000007
#define debug() cout<<"!XD"<<endl
int w[500009];

int main()
{
    fastio
    int n;
    cin>>n;
    for(int i=0; i<n; ++i){
        cin>>w[i];
    }
    ll sum = 0;
    int res=mod;
    int countp=0;
    bool t;
    for(int maska=0; maska<(1<<n); ++maska){
        t=true;
        sum=0;
        countp=0;
        for(int bit=0; bit<n; ++bit){
            if(((1<<bit)&(maska))==0){
                if(sum<0 || w[bit]<0){
                    t=false;
                    break;
                }
                else{
                    sum=0;
                    countp--;
                }
            }
            else{
                countp++;
                sum+=w[bit];
            }
        }
        if(t && sum>=0){
           res=min(res, countp);
        }
        else{
            continue;
        }
    }
    cout<<res+1;
    return 0;
}