#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
using namespace std;
signed main() {
  ios::sync_with_stdio(false); cin.tie(0);
  int n;
  cin >> n;
  vector<int> deg(n);
  for (int i = 0; i + 1 < n; i++) {
    int u, v;
    cin >> u >> v;
    deg[--u]++;
    deg[--v]++;
  }
  int cnt = 0;
  for (int i = 0; i < n; i++) {
    cnt += deg[i] == 1;
  }
  cout << cnt - 2 << endl;
  return 0;
}