import java.util.*;

public class Main {
	public static void main (String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int[] counts = new int[n];
		for (int i = 0; i < n - 1; i++) {
		    int a = sc.nextInt() - 1;
		    int b = sc.nextInt() - 1;
		    counts[a]++;
		    counts[b]++;
		}
		int total = 0;
		for (int x : counts) {
		    if (x > 2) {
		        total += x - 2;
		    }
		}
		System.out.println(total);
	}
}