#include <iostream>
#include <vector>
using namespace std;
struct Node{
	int nodeId;
	int childNum;
	Node(){
		nodeId=0;
		childNum=0;
	};
	void SetNode(int id){
		nodeId=id;
	}
};
int main(int argc, char* argv[])
{
	int N,i;
	cin>>N;
	vector<Node> myNode(N);
	int A,B;
	for (i=0;i<N;i++){
		myNode[i].SetNode(i+1);
	}

	for (i=0;i<N-1;i++){
		cin>>A>>B;
		myNode[A-1].childNum++;
		myNode[B-1].childNum++;
	}
	int Num=0;
	for (i=0;i<N;i++){
		while (myNode[i].childNum>2){
			for (int j=0;j<N;j++){
				if (i==j){
					continue;
				}
				if (myNode[j].childNum<=1){
					myNode[i].childNum--;
					myNode[j].childNum++;
					Num++;
					break;
				}
			}
		}
	}
	cout<<Num<<endl;
	return 0;
}