#include<bits/stdc++.h>
#define int long long
using namespace std;
signed main(){
  int N; cin>>N;
  vector<vector<int>> G(N);
  for(int i=0;i<N-1;i++){
    int a,b; cin>>a>>b;
    G[--a].push_back(--b);
    G[b].push_back(a);
  }
  vector<int> label(N,-1); label[0]=0;
  queue<int>Q; Q.push(0);
  while(!Q.empty()){
    int v=Q.front(); Q.pop();
    for(int t:G[v])if(label[t]==-1){
      label[t]=label[v]^1;
      Q.push(t);
    }
  }
  int a=0,b=0;
  for(int i=0;i<N;i++){
    if(label[i]==0)a++;
    else b++;
  }
  cout<<min(a,b)<<endl;
}