#include <bits/stdc++.h>
using namespace std;

#define LL long long
#define LD long double
#define PII pair<int, int>
#define VI vector<int>
#define VPII vector<PII>
#define f first
#define s second
#define MP make_pair
#define PB push_back
#define endl '\n'
#define SIZ(c) (int)(c).size()
#define ALL(c) (c).begin(), (c).end()
#define REP(i, n) for (int i = 0; i < (int)(n); i++)
#define FOR(i, b, e) for (int i = (b); i <= (int)(e); i++)
#define FORD(i, b, e) for (int i = (b); i >= (int)(e); i--)
#define ll LL
#define st f
#define nd s
#define mp MP
#define pb PB
#define eb emplace_back
#define siz(c) SIZ(c)
const int inf = 1e9 + 7;
const LL INF = 1e18L + 7;

#define sim template<class n
sim, class s> ostream & operator << (ostream &p, pair<n, s> x)
{return p << "<" << x.f << ", " << x.s << ">";}
sim> auto operator << (ostream &p, n y) ->
typename enable_if<!is_same<n, string>::value, decltype(y.begin(), p)>::type
{int o = 0; p << "{"; for (auto c : y) {if (o++) p << ", "; p << c;} return p << "}";}
void dor() {cerr << "\n";}
sim, class...s> void dor(n p, s...y) {cerr << p << " "; dor(y...);}
sim, class s> void mini(n &p, s y) {if (p > y) p = y;}
sim, class s> void maxi(n &p, s y) {if (p < y) p = y;}

#ifdef DEB
#define debug(...) dor(__FUNCTION__, ":", __LINE__, ": ", __VA_ARGS__)
#else
#define debug(...)
#endif

#define I(x) #x " =", (x), " ")

const int MXN = 3e5+5;
int cnt[MXN];
int main()
{
	int n;
	scanf("%d", &n);
	
	int res = 0;
	REP(i, n-1)
		{
		int a, b;
		scanf("%d%d", &a, &b);
		cnt[a]++;
		cnt[b]++;
		}

	FOR(i, 1, n)
		res += max(0, cnt[i]-2);
	
	printf("%d\n", res);
}