#include <stdio.h>

int n, a[100001], ans, i;

int input() {
	int ret = 0; char c = getchar_unlocked();
	while ('0' <= c && c <= '9') { ret = ret * 10 + (c - '0'); c = getchar_unlocked(); }
	return ret;
}

int main() {
    n = input();
    for(i = 0; i < n - 1; ++i) {
        a[input() - 1]++; a[input() - 1]++;
    }
    for(i = 0; i < n; ++i) {
        if (a[i] > 2)ans += a[i] - 2;
    }
    printf("%d\n", ans);
}