#include <cstdio>
#include <vector>

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