#import<bits/stdc++.h>
std::ifstream r("apm.in");std::ofstream w("apm.out");struct s{int x,y,z;}d,e[1<<20];int m,k,i,j,z,t[1<<20],x;int f(int x){return t[x]?t[x]=f(t[x]):x;}int main(){r>>m>>m;while(r>>e[i].x>>e[i].y>>e[i].z)i++;std::sort(e,e+m,[](s a,s b){return a.z<b.z;});for(;j<m;)d=e[j++],(x=f(d.x))^f(d.y)?t[x]=d.y,z+=d.z,e[k++]=d:d;w<<z<<" "<<k<<" ";while(k--)w<<e[k].x<<" "<<e[k].y<<" ";}