#include <iostream>

int main() {

    int N;
    scanf("%d", &N);

    int tomb[N+3];
    for (int i = 0; i < N+2; i++) {
        tomb[i] = 0;
    }

    int result = 0;
    for (int i = 0; i < N-1; i++) {
        int a;
        int b;
        scanf("%d %d", &a, &b);
        if (tomb[a] < 2) {
            ++tomb[a];
        } else {
            ++result;
        }

        if (tomb[b] < 2) {
            ++tomb[b];
        } else {
            ++result;
        }
    }

    printf("%d\n", result);

    return 0;
}