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

using ll = long long;
#define rep(i, n) for(ll i = 0; i < n; i++)

int main() {
	int N;
	cin >> N;
	vector<ll> io(N);
	vector<int> u(N - 1), v(N - 1);
	rep(i, N - 1) {
		cin >> u[i] >> v[i];
		u[i]--;
		v[i]--;
		io[ u[i] ]++;
		io[ v[i] ]++;
	}
	ll ans = N - 1;
	rep(i, N) ans += io[i] * (io[i] - 1) / 2;
	rep(i, N - 1) {
		int x = u[i];
		int y = v[i];
		ans += (io[x] - 1) * (io[y] - 1);
	}
	cout << ans << endl;
}