#include <bits/stdc++.h>

using namespace std;

#define FOR(a, b, c) for(int a = (b); a < (c); a++)

using ll = long long;
#define LL long long
#define PB push_back

const int N = 3e5 + 7;

vector<int> graf[N];

int main() {
    ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    int n; cin >> n;
    FOR(i, 0, n - 1) {
        int a, b; 
        cin >> a >> b;
        a--, b--;
        graf[a].PB(b);
        graf[b].PB(a);
    }

    int res = 0;
    FOR(i, 0, n) {
        res += (graf[i].size() == 1u);
    }
    cout << res - 2 << "\n";
}