#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;
int main() {
	int N;
	cin >> N;
	vector<int> deg(N);
	for (int i = 0; i < N - 1; ++i) {
		int a, b;
		cin >> a >> b; --a, --b;
		++deg[a], ++deg[b];
	}
	sort(deg.begin(), deg.end());
	int ans = 0;
	for (int i = 0; i < N; ++i) {
		ans += abs(deg[i] - (i <= 1 ? 1 : 2));
	}
	cout << ans / 2 << endl;
	return 0;
}