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Cod sursa(job #287533)
#include <cstdlib>
#include <iostream>
#include <fstream>
double n,m;
int p,q;
bool a[4096][4096];
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-1][q-1]=1;
a[q-1][p-1]=1;
}
int rp=0;
for(int i=0;i<n;i++)
{
for(int j=i+1;j<n;j++)
{
if(a[i][j]==1)
for(int k=j+1;k<n;k++)
{
if(a[k][j]==1 && a[k][i]==1) rp++;
}
}
}
fout << rp;
fout.close();
fin.close();
return EXIT_SUCCESS;
}