#include<bits/stdc++.h>
typedef long long ll;
#define pb push_back
#define fr first
#define sc second
#define endl '\n'
using namespace std;
int n;
ll arr[500023];
int dp[500023],las[500023];
int main(){
ios_base::sync_with_stdio(false);cin.tie(NULL);
cin>>n;
for(int i=1;i<=n;i++){
cin>>arr[i];
arr[i]+=arr[i-1];
dp[i]=1;
}
for(int i=1;i<n;i++){
int l=i+1,r=n+1;
while(l<r){
int m=(l+r)/2;
if(arr[m]+arr[las[i]]>=arr[i]*2)r=m;
else l=m+1;
}
if(l!=n+1){
las[l]=i;
dp[l]=dp[i]+1;
}
if(las[i+1]<las[i]){
las[i+1]=las[i];
dp[i+1]=dp[i];
}
}
cout<<dp[n];
}
