Cod sursa(job #499628)

Utilizator mihai995mihai995 mihai995 Data 10 noiembrie 2010 15:13:08
Problema Numarare triunghiuri Scor 0
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.35 kb
Raporteaza aceasta sursa 
#include <fstream>
using namespace std;

int v[1<<10],n;

ifstream in("nrtri.in");
ofstream out("nrtri.out");

int main()
{
	int a,b,i,nr=0;
	in>>n;
	for (i=1;i<=n;i++)
		in>>v[i];
	sort(v+1,v+n+1);
	i=1;
	for (a=1;a<n;a++)
		for (b=a+1;b<=n;b++)
		{
			for (;v[a]+v[b]>v[i] && i<=n;i++);
			nr+=i-b-1;
		}
	out<<nr<<"\n";
	return 0;
}