#include <bits/stdc++.h>
#define rep(i,a,b) for (int i=a; i<b; i++)
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define all(x) (x).begin(),(x).end()
#define debug printf
using namespace std;
typedef pair <int, int> PII;
typedef vector <int> VI;
typedef long long ll;
typedef long double ld;

const int MN = 300005;

int ile[MN];

int main ()
{
	int n;
	scanf("%d", &n);
	for(int i = 1; i < n; ++i)
	{
		int a, b;
		scanf("%d%d", &a, &b);
		++ile[a];
		++ile[b];
	}
	int suma = 0;
	for(int i = 1; i <= n; ++i)
		suma += max(0, ile[i] - 2);
	printf("%d", suma);
}