#include <bits/stdc++.h>
using namespace std;
#define REP(i,N) for(i=0;i<N;i++)
typedef long long ll;
typedef pair<int, int> P;
typedef struct{
  int first;
  int second;
  int third;
}T;

//昇順
bool comp_Se(T& l, T& r){
  return l.second < r.second;
}

int main(void){
  int N;
  cin >> N;
  vector<int> v(N,0);
  int i,num = N-2;
  REP(i,N-1){
    int x,y;
    cin >> x >> y;
    if(v[x-1]==1)num--;
    v[x-1]++;
    if(v[y-1]==1)num--;
    v[y-1]++;
  }
  cout << num << endl;
  return 0;
}