#include <iostream>
#include<queue>
#include <vector>
using namespace std;

int main()
{
    int k;
    cin >> k;
    vector<int> graph[k + 1];
    for(int i = 0; i < k - 1; i++) {
        int a, b;
        cin >> a >> b;
        graph[a].push_back(b);
        graph[b].push_back(a);
    }
    return 0;
}