#include<stdio.h>
#define dim 10001
using namespace std;
long a[dim];
int main()
{int i,na,nb,div,n,m;
 FILE *f=fopen("oz.in","r"), *g=fopen("oz.out","w");
  fscanf(f,"%d%d",&n,&m);
  for(i=1;i<=n;i++) a[i]=1; 
  for(i=1;i<=m;i++)
    {fscanf(f,"%d%d%d", &na,&nb,&div);
     a[na]=a[na]*div; a[nb]=a[nb]*div;}

 for(i=1;i<=n;i++)
   if(a[i]>2000000) {fprintf(g,"-1\n"); fclose(f); fclose(g); return 0;}

for(i=1;i<=n;i++)   
 fprintf(g,"%ld ",a[i]);

fprintf(g,"\n");
fclose(f);
fclose(g);
return 0;
}