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#include<iostream>
#include<algorithm>
#include<fstream>
using namespace std;
ifstream f("nrtri.in");
ofstream g("nrtri.out");
int main()
{
int n, v[801], i, j, k, nr = 0;
f>>n;
for(i=0;i<n;i++)
f>>v[i];
sort(v,v+n);
for(i=0;i<n;i++)
cout<<v[i]<<" ";
for(i=0;i<n-2;i++)
for(j=i+1;j<n-1;j++)
for(k=j+1;k<n;k++)
if((v[i] + v[j]) >= v[k])
nr ++;
else
break;
g<<nr;
f.close();
g.close();
return 0;
}