#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
#include <math.h>
#include <limits.h>
#define Max(a, b) ((a) > (b) ? (a) : (b))
#define Min(a, b) ((a) > (b) ? (b) : (a))
#define abs(x) ((x) > 0 ? (x) : -(x))
#define rep(i, n) for(int i = 0; i < (n); i++)
#define INF 1000000000000 //10^12
#define MOD 1000000007 //10^9 + 7
#define endl printf("\n")
typedef long long ll;

int
main(int argc, char **argv)
{
  int n, a, b, cnt[100000] = {};
  scanf("%d", &n);
  for (int i = 0; i < n - 1; i++) {
    scanf("%d %d", &a, &b);
    a--; b--;
    cnt[a]++; cnt[b]++;
  }
  int ans = 0;
  for (int i = 0; i < n; i++) {
    if(cnt[i] == 1) ans++;
  }
  ans -= 2;
  printf("%d\n", ans);

  return 0;
}