#include <iostream>
#include <vector>
#include <atcoder/dsu>
using namespace std;
using ll = long long;
using ull = unsigned long long;
#define rep(i,n) for(int i=0; i<(n); i++)

int N;

int main(){
  cin >> N;
  atcoder::dsu G(2*N);
  rep(i,N-1){
    int u,v; cin >> u >> v; u--; v--;
    G.merge(u,v+N);
    G.merge(u+N,v);
  }
  auto GG = G.groups();
  int C[2] = {};
  for(int i : GG[0]) C[i/N]++;
  int ans = min(C[0],C[1]);
  cout << ans << "\n";
  return 0;
}

struct ios_do_not_sync{
  ios_do_not_sync(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
  }
} ios_do_not_sync_inst;