#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<ll, ll> l_l;

#define EPS (1e-7)
#define INF (1e9)
#define PI (acos(-1))
//const ll mod = 1000000007;
int degree[100500];
int main() {
    //cout.precision(10);
    cin.tie(0);
    ios::sync_with_stdio(false);
    int N;
    cin >> N;
    for(int i = 1; i < N; i++) {
        int a, b;
        cin >> a >> b;
        degree[a]++;
        degree[b]++;
    }
    int ans = -2;
    for(int i = 1; i <= N; i++) {
        if(degree[i] == 1) ans++;
    }
    cout << ans << endl;
    return 0;
}