#include <fstream>
#include <vector>
using namespace std;
ifstream cin("critice.in");
ofstream cout("critice.out");
struct Op
{
    int dest;
    int cost;
    int ind;
};
vector<Op> vec[1005];
int main()
{
    int n,m,a,b,c;
    cin>>n>>m;
    for(int i=1;i<=m;++i)
    {
        cin>>a>>b>>c;
        vec[a].push_back({b,c,i});
        vec[b].push_back({a,c,i});
    }
    cout<<0;
    return 0;
}