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Cod sursa(job #287468)
#include <cstdlib>
#include <iostream>
#include <fstream>
short int p,q,n,m,a[4098][4098];
using namespace std;
int main(int argc, char *argv[])
{
ifstream fin("triplete.in");
ofstream fout("triplete.out");
fin >> n >> m;
for(int i=0;i<m;i++)
{
fin >> p >> q;
a[p][q]=1;
a[q][p]=1;
}
int rp=0;
for(int i=1;i<=n;i++)
{
for(int j=i+1;j<=n;j++)
{
for(int k=j+1;k<=n;k++)
{
if(i!=j)
if(a[i][j] && a[i][k]) rp++;
}
}
}
fout << rp;
fout.close();
fin.close();
return EXIT_SUCCESS;
}