#include <iostream>
#include <vector>
using namespace std;
typedef long long ll;

int main() {
    int n;
    cin >> n;
    vector<int> deg(n+3,0);
    for (int i = 0; i < n - 1; i++) {
        int a,b;
        cin >> a >> b;
        deg[a]++;
        deg[b]++;

    }
    int br = 0;
    for (int i = 1; i <= n; i++) {
        if (deg[i] == 1)
            br++;
    }
    cout<<br-2<<endl;

    return 0;
}