#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, x, y;
  cin >> n;
  vector<vector<int> > g(n);
  for (int i = 0; i < n - 1; i++) {
    cin >> x >> y;
    x--;
    y--;
    g[x].push_back(y);
    g[y].push_back(x);
  }
  int res = 0;
  for (int i = 0; i < n; i++) {
    if (g[i].size() <= 1) res++;
  }
  cout << res;
  return 0;
}
