import java.io.*;
import java.util.*;

public class Main {
    static ArrayList<ArrayList<Integer>> graph = new ArrayList<>();
    static int[][] dp;
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        int n = sc.nextInt();
        dp = new int[n][2];
        for (int i = 0; i < n; i++) {
            graph.add(new ArrayList<>());
            Arrays.fill(dp[i], -1);
        }
        for (int i = 0; i < n - 1; i++) {
            int a = sc.nextInt() - 1;
            int b = sc.nextInt() - 1;
            graph.get(a).add(b);
            graph.get(b).add(a);
        }
        System.out.println(Math.max(dfw(0, 0, 0), dfw(0, 0, 1)));
    }
    
    static int dfw(int idx, int p, int type) {
        if (dp[idx][type] < 0) {
            if (type == 0) {
                dp[idx][type] = 0;
                for (int x : graph.get(idx)) {
                    if (x == p) {
                        continue;
                    }
                    dp[idx][type] += Math.max(dfw(x, idx, 0), dfw(x, idx, 1));
                }
            } else {
                dp[idx][type] = 1;
                for (int x : graph.get(idx)) {
                    if (x == p) {
                        continue;
                    }
                    dp[idx][type] += Math.max(dfw(x, idx, 0), dfw(x, idx, 1) - 1);
                }
            }
        }
        return dp[idx][type];
    }
}
class Scanner {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    StringTokenizer st = new StringTokenizer("");
    
    public Scanner() throws Exception {
        
    }
    
    public int nextInt() throws Exception {
        return Integer.parseInt(next());
    }
    
    public long nextLong() throws Exception {
        return Long.parseLong(next());
    }
    
    public double nextDouble() throws Exception {
        return Double.parseDouble(next());
    }
    
    public String next() throws Exception {
        if (!st.hasMoreTokens()) {
            st = new StringTokenizer(br.readLine());
        }
        return st.nextToken();
    }
}