#include <bits/stdc++.h> 
using namespace std;
using ll =long long;
#define all(v) v.begin(),v.end()
 #define rep(i,a,b) for(int i=a;i<b;i++)
#define rrep(i,a,b) for(int i=a;i>=b;i--)

vector<vector<ll>> vec;
vector<bool> note;

ll ans=0;

void solve(ll k,ll from) {

ll count=0;

  for(auto x:vec[k]) {
    if(x==from) continue;
    solve(x,k);
    if(!note[x]) count++;
  }

  if(count>0) {
    ans+=count;
    note[k]=true;
  }
  return ;
}



int main() {
   ll N;cin>>N;
vec=vector<vector<ll>> (N,vector<ll> (0));
note=vector<bool> (N,false);

for(ll i=0;i<N-1;i++) {
  ll U,V;cin>>U>>V;
  U--;V--;
  vec[U].push_back(V);
  vec[V].push_back(U);
}

solve(0,0);
if(!note[0]) ans++;

cout<<ans<<endl;
}