import java.util.Scanner;


public class Bob {

    
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        
        int n = sc.nextInt();
        
        int[] arr = new int[n + 1];
        
        for (int i = 0; i < n-1; i++) {
            int u = sc.nextInt();
            int v = sc.nextInt();
            
            arr[u-1]++;
            arr[v-1]++;
        }
        
        int sum = 0;
        
        for (int i = 0; i < n; i++) {
            if (arr[i] > 2) {
                sum += arr[i] - 2;
            }
        }
        
        System.out.println(sum);
    }
    
}