#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
#define pb push_back
#define fi first
#define se second
typedef pair<ll,ll> P;
#define Mod 1000000007
using VP = vector<P>; using VVP = vector<VP>;
using VI = vector<ll>; using VVI = vector<VI>; using VVVI = vector<VVI>;

int main(){
    ll i,j;
    ll n;
    cin>>n;
    vector<ll> c(n,0);
    for(i=0;i<n-1;i++){
        ll x,y;
        cin>>x>>y;
        x--;
        y--;
        c[x]++;
        c[y]++;
    }
    sort(c.begin(),c.end());
    ll ans=0;
    ans+=abs(c[0]-1)+abs(c[1]-1);
    for(i=2;i<n;i++){
        ans+=abs(c[i]-2);
    }
    cout<<ans/2<<endl;
    
    return 0;
}