#include "bits/stdc++.h"

using namespace std;

#define int long long
#define ll long long
typedef pair<int, int> P;
#define mod 1000000007
#define INF (1LL<<60)

#define rep(i,n) for(int i=0, i##_len=(n); i<i##_len; ++i)
#define YES cout << "YES" << endl;
#define Yes cout << "Yes" << endl;
#define NO cout << "NO" << endl;
#define No cout << "No" << endl;


signed main(){

	int N;
	cin >> N;
	vector<vector<int>> g;
	g.assign(N, vector<int>());
	rep(i, N - 1){
		int a, b;
		cin >> a >> b;
		a--; b--;
		g[a].push_back(b);
		g[b].push_back(a);
	}

	int cnt = 0;
	rep(i, N){
		if (g[i].size() == 1) cnt++;
	}

	cout << cnt-2 << endl;
	return 0;
}