#include <fstream>
#define DIM 5000
using namespace std;

int n,m,inc[DIM],sf[DIM];

int main()
{
    ios_base::sync_with_stdio(false);
    ifstream fin("triplete.in");
    ofstream fout("triplete.out");
    int a,b;
    fin>>n>>m;
    for(int i=1;i<=m;i++) {
        fin>>a>>b;
        inc[min(a,b)]++;
        sf[max(a,b)]++;
    }
    long long s=0;
    for(int i=1;i<=n;i++)
        s+=min(inc[i],sf[i]);
    fout<<s;
    return 0;
}