import java.util.*;

public class Main {
    static ArrayList<ArrayList<Integer>> graph = new ArrayList<>();
    static int[][] dp;
	public static void main (String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		for (int i = 0; i < n; i++) {
		    graph.add(new ArrayList<>());
		}
		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);
		}
		dp = new int[n][2];
		System.out.println(Math.max(dfw(0, 0, 0) , dfw(0, 0, 1)));
	}
	
	static int dfw(int idx, int parent, int flag) {
	    if (dp[idx][flag] != 0) {
	        return dp[idx][flag];
	    }
	    int sum = 0;
	    if (flag == 0) {
	        for (int x : graph.get(idx)) {
	            if (x == parent) {
	                continue;
	            }
	            sum += Math.max(dfw(x, idx, 0), dfw(x, idx, 1));
	        }
	    } else {
	        sum++;
	        for (int x : graph.get(idx)) {
	            if (x == parent) {
	                continue;
	            }
	            sum += Math.max(dfw(x, idx, 0), dfw(x, idx, 1) - 1);
	        }
	    }
	    return dp[idx][flag] = sum;
	}
}