#include <algorithm>
#include <iostream>
#include <vector>
using namespace std;

int main() {
	int N;
	cin >> N;
	vector<int> tmp1(N);
	for (int i = 0; i < N - 1; ++i) {
		int a, b;
		cin >> a >> b;
		++tmp1[a - 1];
		++tmp1[b - 1];
	}
	int tmp2 = 0, tmp3 = 0;
	for (int& i : tmp1) {
		if (i == 0) ++tmp2;
		else if (i > 2) tmp3 += i - 2;
	}
	cout << max(tmp2, tmp3);
}