#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
#define pb push_back
#define mp make_pair
#define rep(i,n) for(int i=0;i<(n);++i)
const int mod=1000000007;

int main(){
	cin.tie(0);
	ios::sync_with_stdio(false);
	int n;cin >> n;
	vector<int> a(n+1);
	rep(i,n-1){
		int x,y;cin >> x >> y;
		a.at(x)++;
		a.at(y)++;
	}
	int ans=0;
	rep(i,n+1) if(a.at(i)>2) ans+=a.at(i)-2;
	cout << ans << endl;
}