#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define llong long long

int main() {
    int n;
    cin >> n;
    vector<int> lines(n);
    int result = 0;
    rep(i, n-1) {
        int a, b;
        cin >> a >> b;
        if (lines[a-1] < 2) lines[a-1] += 1;
        else result += 1;
        if (lines[b-1] < 2) lines[b-1] += 1;
        else result += 1;
    }

    cout << result << "\n";
}