#include<bits/stdc++.h>
using namespace std;
#ifdef LOCAL_DEBUG
  #include "LOCAL_DEBUG.hpp"
#endif
#define int long long

signed main(){

  int n; cin >> n;
  vector<vector<int>> G(n);
  vector<int> indeg(n, 0);
  for(int i = 0; i < n-1; i++){
    int a, b; cin >> a >> b;
    a--, b--;
    G[a].push_back(b);
    G[b].push_back(a);
    indeg[a]++;
    indeg[b]++;
  }

  int s = 0;
  for(int i = 0; i < n; i++){
    if(indeg[i] == 1){
      s = i;
      break;
    }
  }

  int ans = 0;
  function< void(int,int) > dfs =
  [&](int u, int pre){
    int child = 0;
    for(int v : G[u]){
      if(v == pre) continue;
      dfs(v, u);
      child++;
    }
    if(child == 0) return;
    ans += child - 1;
  };
  dfs(s, -1);
  cout << ans << endl;

  return 0;
}