#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
#define rep(i, n) for(int i=0;i<(n);++i)
#define rep1(i, n) for(int i=1;i<=(n);i++)
#define ll long long
using mint = modint998244353;
using P = pair<ll,ll>;
using lb = long double;
using T = tuple<ll, ll, ll>;
#ifdef LOCAL
#  include <debug_print.hpp>
#  define dbg(...) debug_print::multi_print(#__VA_ARGS__, __VA_ARGS__)
#else
#  define dbg(...) (static_cast<void>(0))
#endif

int main()
{
	int n;
	cin >> n;
	vector<vector<int>> g(n);
	vector<ll> d(n), e(n);
	rep(i,n-1){
		int u, v;
		cin >> u >> v;
		--u;--v;
		g[u].push_back(v);
		g[v].push_back(u);
		d[u]++;
		d[v]++;
	}
	ll sum = 0;
	rep(i,n){
		for(int v : g[i]){	
			e[i] += d[v]-1;
		}
	}
	rep(i,n) sum += d[i];
	rep(i,n){
		for(int v : g[i]) {
			sum += e[v];
		}
	}
	sum /= 2;
	cout << sum << endl;
	return 0;
}