#include <iostream>
#include <vector>
#include <algorithm>
#include <array>
#include <iterator>
#include <string>
#include <cctype>
#include <cstring>
#include <cstdlib>
#include <cassert>
#include <cmath>
#include <ctime>
#include <iomanip>
#include <numeric>
#include <stack>
#include <queue>
#include <map>
#include <unordered_map>
#include <set>
#include <unordered_set>
#include <bitset>
#include <random>
#include <utility>
#include <functional>
using namespace std;
void Main()
{
	int N;
	cin >> N;
	vector<int> U(N),V(N);
	vector<vector<int>> G(N);
	for(int i = 1;i < N;i++)
	{
		cin >> U[i] >> V[i];
		U[i]--; V[i]--;
		G[U[i]].push_back(V[i]);
		G[V[i]].push_back(U[i]);
	}
	long long ans = 0;
	for(int i = 0;i < N;i++)
	{
		int deg = (int)G[i].size();
		ans += (long long)deg * (deg - 1) ;
		for(int j : G[i])
		{
			ans += (long long)(deg - 1) * ((int)G[j].size() - 1);
		}
	}
	ans /= 2;
	ans += N - 1;
	cout << ans << "\n";
}
int main()
{
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	int tt = 1;
	/* cin >> tt; */
	while(tt--) Main();
}