#include <bits/stdc++.h>
using namespace std;
int n;
int deg[1001];
int main() {
  cin >> n;
  for (int i = 0; i < n - 1; i++) {
    int a, b;
    cin >> a >> b;
    deg[a]++;
    deg[b]++;
  }
  int ans = 0;
  for (int i = 1; i <= n; i++)
    if (deg[i] == 1) ans++;
  cout << ans << endl;
  return 0;
}
