#include<stdio.h>
#include<algorithm>
#include<windows.h>
using namespace std;
struct edge{
int begin;
int end;
int weight;
};
bool cmp(struct edge a,struct edge b){
return a.weight<b.weight;
}
];
];
int find(int index){
){
index=father[index];
}
return index;
}
void minTree(int num){
;i<num;i++){
int m=find(edges[i].begin);
int n=find(edges[i].end);
if(m!=n){
father[m]=n;
printf("(%d %d)\n",edges[i].begin,edges[i].end);
}
}
}
int main(){
int n;
scanf("%d",&n);
;i<n;i++){
scanf("%d%d%d",&edges[i].begin,&edges[i].end,&edges[i].weight);
}
printf("\n");
sort(edges,edges+n,cmp);
minTree(n);
}