//
// Created by cteam012 on 12/1/19.
//
#include <iostream>
#include <vector>
using namespace std;


int main() {
    ios_base::sync_with_stdio(0);
    int count;
    cin >> count;
    vector<int> vals = vector<int>(count,0);
    for(int i = 0; i < count-1; ++i)
    {
        int x, y;
        cin >> x >> y;
        x--;
        y--;
        vals[x]++;
        vals[y]++;
    }

    int sum = 0;

    for(int i =0; i < count; ++i)
    {
        if(vals[i] > 2)
        {
            sum += vals[i] -2;
        }
    }

    cout << sum;

    return 0;
}