#include "bits/stdc++.h"
#define in std::cin
#define out std::cout
#define rep(i,N) for(LL i=0;i<N;++i)
typedef long long int LL;

int main()
{
	LL N;
	in >> N;
	std::vector<LL>a(N - 1), b(N - 1);
	rep(i, N - 1) in >> a[i] >> b[i];

	std::vector<LL>cnt(N + 1);
	rep(i, N - 1)
	{
		++cnt[a[i]];
		++cnt[b[i]];
	}

	LL ans = 0;
	for (LL i = 1; i <= N; ++i)
	{
		if (cnt[i] > 2) ans += cnt[i] - 2;
	}
	out << ans << std::endl;
}