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#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("nrtri.in");
ofstream fout("nrtri.out");
int v[1000];
int main()
{
int n, maxi=-1, mini=3001, x=0, i, j, k;
fin>>n;
for(i=1; i<=n; i++)
fin>>v[i];
for(i=0; i<=n-2; i++)
{
for(j=i+1; j<=n-1; j++)
{
if(v[i]>v[j])
{
k=v[i];
v[i]=v[j];
v[j]=k;
}
}
}
for(i=1; i<=n; i++)
{
for(j=i; j<=i+2; j++)
{
if(v[i]>maxi)
maxi=v[j];
}
if(v[i]+v[i+1]+v[i+2]-maxi>=maxi)
x++;
}
cout<<x;
return 0;
}