#include<bits/stdc++.h>

using namespace std;
using Graph=vector<vector<int>>;

void rep(int v,int pv,int cc,vector<int> &col,Graph &g){
  col[v]=cc;
  for(auto &nx : g[v]){
    if(nx==pv){continue;}
    rep(nx,v,1-cc,col,g);
  }
}

int main(){
  int n;
  cin >> n;
  Graph g(n+1);
  for(int i=1;i<n;i++){
    int u,v;
    cin >> u >> v;
    g[u].push_back(v);
    g[v].push_back(u);
  }
  vector<int> col(n+1);
  rep(1,-1,0,col,g);
  int sig=0;
  for(int i=1;i<=n;i++){sig+=col[i];}
  cout << min(sig,n-sig) << '\n';
  return 0;
}