#include <fstream>

using namespace std;

ifstream cin ("oz.in");
ofstream cout ("oz.out");

int n,m,i,j;
unsigned long long v[10001],k;

int main()
{
    int n,m;
    cin>>n>>m;
    while (m--){
        cin>>i>>j>>k;
        if (!v[i]) v[i]++;
        v[i]*=k;
        if (!v[j]) v[j]++;
        v[j]*=k;
    }
    for (int i=1; i<=n; ++i)
        if (!v[i]){
            cout<<-1;
            break;
        }
    for (int i=1; i<=n; ++i) cout<<v[i]<<" ";

    return 0;
}