#include <bits/stdc++.h>

#define ll long long;
#define ull unsigned long long;

#define log(var) if(debug) {cout << #var << ": " << (var) << endl};
#define tr(container, it) \
	 for(typeof(container.begin() it = container.begin(); it != container.end(); it++)

using namespace std;

int main()
{
	int n;
	cin >> n;
	int* deg = new int[n]();
	for (int i = 0; i<n-1;i++)
	{
		int a, b;
		cin >> a >> b;
		a--;
		b--;
		deg[a]++;
		deg[b]++;
	}
	int cost = 0;
	for (int i = 0; i<n;i++)
	{
		if (deg[i] > 2)
			cost += deg[i]-2;
	}
	cout << cost << endl;
	return 0;
}