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

public class Bob {

	public static void main(String[] args) throws Exception{
		BufferedReader in=new BufferedReader(new InputStreamReader(System.in));
		int n=Integer.parseInt(in.readLine());
		int[]count=new int[n];
		for(int i=0;i<n-1;i++) {
			StringTokenizer st=new StringTokenizer(in.readLine());
			int a=Integer.parseInt(st.nextToken());
			int b=Integer.parseInt(st.nextToken());
			count[a-1]++;
			count[b-1]++;
		}
		int len=0;
		for(int i:count) {
			if(2<i) {
				len+=i-2;
			}
		}
		System.out.println(len);
	}

}