#include <bits/stdc++.h>

using namespace std;

using ll = long long;

int solve(int cur, int par, vector< vector<int> >& g) {
    int res = 0;
    int cnt = 0;
    for (int nex : g[cur]) {
        if (nex == par) continue;
        res += solve(nex, cur, g);
        cnt++;
    }
    res += max(cnt - 1 - (cur == 0), 0);
    return res;
}

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);
    int n;
    cin >> n;
    vector< vector<int> > g(n);
    for (int i = 1; i < n; i++) {
        int a, b;
        cin >> a >> b;
        a--; b--;
        g[a].push_back(b);
        g[b].push_back(a);
    }

    cout << solve(0, -1, g) << endl;
    return 0;
}