#include <bits/stdc++.h>
using namespace std;
#define x first
#define y second
#define pb push_back
#define all(a) a.begin(),a.end()
#define int long long
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
typedef pair<int,int>pii;
typedef pair<ll,ll>pll;
typedef vector<ll>vll;
typedef vector<int>vi;
typedef vector<bool>vb;
typedef vector<vi>vvi;
typedef vector<vll>vvll;
typedef vector<pii>vpii;
typedef vector<pll>vpll;
const int N=5e5+55;
int a[N],b[N],dp[N],pref[N];
signed main(){
ios_base::sync_with_stdio(0);
cin.tie(0);
cout.tie(0);
int n;
cin>>n;
for(int i=1;i<=n;++i){
cin>>a[i];
pref[i]=pref[i-1]+a[i];
}
for(int i=1;i<=n;++i){
b[i]=max(b[i],b[i-1]);
dp[i]=dp[b[i]]+1;
int l=i+1,r=n;
while(l<r){
int mid=(l+r)/2;
if(pref[mid]-pref[i]<pref[i]-pref[b[i]]){
l=mid+1;
}
else{
r=mid;
}
}
b[l]=i;
}
cout<<dp[n];
}
