#include<iostream>
using namespace std;

int v[100005];

int main(void){
    int N; cin >> N;
    for (int i = 0; i < N-1; i++){
        int a, b; cin >> a >> b;
        v[a]++;
        v[b]++;
    }
    int ans = 0;
    for (int i = 1; i <= N; i++){
        if (v[i] == 1) ans++;
    }
    cout << ans-2 << endl;
}