#include "bits/stdc++.h"

using namespace std;
typedef long long ll;
const ll MOD = 1e9 + 7;
vector<int> G[100000];
ll memo[100000][2];
ll solve(int v, int f, int p) {
	if (memo[v][f] != -1) return memo[v][f];
	ll ret = 0;
	if (f == 0) {
		ret++;
		for (int to : G[v]) {
			if (to == p) continue;
			ret += max(solve(to, 0, v) - 1, solve(to, 1, v));
		}
	}
	else {
		for (int to : G[v]) {
			if (to == p) continue;
			ret += max(solve(to, 0, v), solve(to, 1, v));
		}
	}
	return memo[v][f] = ret;
}
 int main() {
	 int N;
	 cin >> N;
	 for (int i = 0; i < N - 1; i++) {
		 int u, v;
		 cin >> u >> v;
		 u--; v--;
		 G[u].push_back(v);
		 G[v].push_back(u);
	 }
	 memset(memo, -1, sizeof(memo));
	 ll ans = max(solve(0, 0, -1), solve(0, 1, -1));
	 cout << ans << endl;
}