#include <fstream>
using namespace std;

ifstream f("triplete.in");
ofstream g("triplete.out");

int N,M,i,j,r;
unsigned int a[4100][150],b[4100][150];
int x[67000],y[67000];
int main()
{
    f>>N>>M;
    while(M--)
    {
        f>>x[M]>>y[M];
        a[x[M]][y[M]>>5]|=(1<<(y[M]&31));
        b[y[M]][x[M]>>5]|=(1<<(x[M]&31));
    }
    for(i=0;x[i];++i)
        for(j=0;(j<<3)<=N;++j)
            r+=__builtin_popcount(a[x[i]][j]&b[y[i]][j]);
    g<<r;

    return 0;
}