#include <bits/stdc++.h>
using namespace std;
int main (){
    int n,x,count=0;
    cin >> n;
    vector<int> v(n,0);

    for(int i=0;i<2*(n-1);i++){
        cin >> x;
        v.at(x-1) += 1;
    }//input

    for(int j=0;j<n;j++){
        if(v.at(j)==1){
            count++;
        }
    }
    cout << fabs(count-2) << endl;
}