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

#define FOR(i, a, b) for (int i = (int)(a); i < (int)(b); ++i)
#define REP(i, n) FOR(i, 0, n)
#define TRACE(x) cerr << #x << " = " << x << endl
#define _ << " _ " <<

#define pb push_back
#define x first
#define y second

typedef long long ll;
typedef long double lf;

const int MAXN = 500500;

int cnt[MAXN];

int main(void) {
  int n;
  scanf("%d", &n);
  REP(i, n - 1) {
    int u, v;
    scanf("%d%d", &u, &v);
    u--; v--;
    cnt[u]++;
    cnt[v]++;
  }
  int ans = 0;
  REP(i, n) {
    ans += max(0, cnt[i] - 2);
  }
  printf("%d\n", ans);
  return 0;
}