#include <algorithm>
#include <cstdio>
#include <deque>
#include <iomanip>
#include <iostream>
#include <queue>
#include <stack>
#include <utility>
#include <vector>
using std::cerr;
using std::cin;
using std::cout;
using std::endl;

void OutputError(std::string s) {
  cerr << "\033[93m" << s << "\033[m" << endl;
  return;
}

int main(void) {
  cout << std::fixed << std::setprecision(10);
  cin.tie(0);
  std::ios::sync_with_stdio(false);
  int n;
  cin >> n;
  std::vector<int> dim(n + 1, 0);
  for (int i = 0; i < n - 1; i++) {
    int a, b;
    cin >> a >> b;
    dim[a]++;
    dim[b]++;
  }
  int result = 0;
  for (int i = 1; i <= n; i++) {
    if (dim[i] == 1) result++;
  }
  cout << ((result >= 2) ? result - 2 : 0) << endl;
  return 0;
}