#include "bits/stdc++.h"

using namespace std;

using ll = long long;
using ld = long double;

const double PI = 3.1415926535897932384626433832795;

const int dx[] = { 0, 1, 0, -1 };
const int dy[] = { -1, 0, 1, 0 };

int gcd(int x, int y) { return y ? gcd(y, x % y) : abs(x); }
ll gcd(ll x, ll y) { return y ? gcd(y, x % y) : abs(x); }
int lcm(int x, int y) { return x / gcd(x, y) * y; }
ll lcm(ll x, ll y) { return x / gcd(x, y) * y; }

int main() {
	ios::sync_with_stdio(false);
	cin.tie(0);

	int n;
	cin >> n;

	vector<vector<int>> g(n);
	for (int i = 0; i < n - 1; i++) {
		int a, b;
		cin >> a >> b;
		a--; b--;
		
		g[a].push_back(b);
		g[b].push_back(a);
	}


	int ans = 0;
	for (int i = 0; i < n; i++) {
		int deg = g[i].size();

		if (deg >= 2) {
			ans += abs(deg - 2);
		}
	}

	cout << ans << endl;
	return 0;
}