import java.util.Scanner;

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