#include <iostream>
#include <vector>
using ll = long long;
#define MOD 1000000007
using namespace std;

int main(){
    int N;
    ll cnt = 0;
    cin >> N;
    vector<int> d(N,0);
    for(int i = 0; i < N-1; i++)
    {
        int a,b;
        cin >> a >> b;
        a--;b--;
        d[a]++;
        d[b]++;
    }
    for(int i = 0; i < N; i++)
    {
        if (d[i] == 1) {
            cnt++;
        }
    }
    cout << cnt - 2 << endl;
    return 0;
}