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

int main(){
	int n; cin >> n;
	vector<int> deg(n);
	vector<int> x(n-1), y(n-1);
	for (int i=0; i<n-1; i++){
		int u, v; cin >> u >> v;
		u--; v--;
		deg[u]++;
		deg[v]++;
		x[i] = u;
		y[i] = v;
	}

	long long ans = 0;
	for (int i=0; i<n-1; i++){
		ans += (long long)(deg[x[i]] - 1) * (deg[y[i]] - 1);
	}
	for (int i=0; i<n; i++){
		ans += (long long)deg[i] * (deg[i] - 1) / 2;
	}
	ans += n - 1;

	cout << ans << '\n';
}