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

int main(){
    int N;
    cin >> N;
    int deg[100000] = {0};
    for(int i=0; i<N-1; i++){
        int a, b;
        scanf("%d %d", &a, &b);
        deg[a-1]++;
        deg[b-1]++;
    }

    int leaf = 0;
    for(int i=0; i<N; i++) if(deg[i] == 1) leaf++;
    cout << leaf-2 << endl;
    return 0;
}