#include <bits/stdc++.h>
#define rep(i, a, n) for(int i = a; i < n; i++)
#define int long long
using namespace std;
typedef pair<int, int> P;
const int mod = 1000000007;
const int INF = 1e18;

signed main(){
	cin.tie(nullptr);
	ios::sync_with_stdio(false);
	int n;
	cin >> n;
	vector<int> c(n);
	rep(i, 0, n - 1){
		int u, v;
		cin >> u >> v;
		u--; v--;
		c[u]++;
		c[v]++;
	}
	sort(c.begin(), c.end());
	int ans = 0;
	vector<int> b(n, 2);
	b[0] = b[1] = 1;
	rep(i, 0, n){
		ans += abs(b[i] - c[i]);
	}
	cout << ans / 2 << endl;
}