CANNOT BE UNSEEN

#include <fstream>
#include <algorithm>
using namespace std;
int e[1001],a,n,i,j,d=0,l;

#include <fstream.h>
#include <stdlib.h>
int e[1001];
int compar(const void * a,const void * b)
{return ( *(int*)a - *(int*)b );}

int main()

{
    ifstream q("nrtri.in");
    ofstream w("nrtri.out");
    q>>n;
    for(i=1; i<=n; i++)
        q>>e[i];
    sort(e+1,e+n+1);
    for(i=1; i<=n; i++)
        for(l=i+1; l<=n; l++)
            for(j=n; j>=l+1; j--)
                if(e[j]<=e[i]+e[l])
                {
                    d=d+(j-l);
                    break;
                }
    w<<d;
    return 0;
}
 

{int a,n,i,j,d=0,l;
ifstream q("nrtri.in");
ofstream w("nrtri.out");
q>>n;
for(i=1;i<=n;i++)
  q>>e[i];
qsort(e,n+1,sizeof(e[0]),compar);
for(i=1;i<=n;i++)
  for(l=i+1;l<=n;l++)
    for(j=n;j>=l+1;j--)
	  if(e[j]<=e[i]+e[l])
	   {d=d+(j-l);
	   break;}
w<<d;
return 0;}