#include <bits/stdc++.h>
//#include <atcoder/all>
using namespace std;
//using namespace atcoder;
//using mint = modint998244353;
//const int mod = 998244353;
//using mint = modint1000000007;
//const int mod = 1000000007;
//const int INF = 1e9;
//const long long LINF = 1e18;
#define rep(i, n) for (int i = 0; i < (n); ++i)
#define rep2(i,l,r)for(int i=(l);i<(r);++i)
#define rrep(i, n) for (int i = (n-1); i >= 0; --i)
#define rrep2(i,l,r)for(int i=(r-1);i>=(l);--i)
#define all(x) (x).begin(),(x).end()
#define allR(x) (x).rbegin(),(x).rend()
#define P pair<int,int>
template<typename A, typename B> inline bool chmax(A & a, const B & b) { if (a < b) { a = b; return true; } return false; }
template<typename A, typename B> inline bool chmin(A & a, const B & b) { if (a > b) { a = b; return true; } return false; }

int main() {
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	int n; cin >> n;
	vector<vector<int>>to(n);
	vector<P>e(n - 1);
	rep(i, n - 1) {
		int u, v; cin >> u >> v;
		u--, v--;
		to[u].push_back(v);
		to[v].push_back(u);
		e[i] = { u,v };
	}
	long long ans = n - 1;
	rep(i, n) {
		long long sz = to[i].size();
		ans += sz * (sz - 1) / 2;
	}
	rep(i, n - 1) {
		long long x = to[e[i].first].size() - 1;
		long long y = to[e[i].second].size() - 1;
		ans += x * y;
	}
	cout << ans << endl;
	return 0;
}