#include <bits/stdc++.h>
using namespace std;
#define FOR(i,a,b) for(int i=(a);i<(b);++i)
#define REP(i,n) FOR(i,0,n)
#define ALL(v) begin(v),end(v)
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; }
using ll = long long;
using pii = pair<int, int>;
constexpr ll INF = 1ll<<30;
constexpr ll longINF = 1ll<<60;
constexpr ll MOD = 1000000007;
constexpr bool debug = false;
//---------------------------------//

int main() {
	int N;
	cin >> N;
	vector<vector<int>> g(N);
	REP(i, N - 1) {
		int a, b;
		scanf("%d %d", &a, &b);
		--a; --b;
		g[a].emplace_back(b);
		g[b].emplace_back(a);
	}
	
	ll ans = 0;
	vector<int> childs(N);
	auto dfs = [&](auto self, int u, int p) -> int {
		bool leaf = true;
		vector<int> childs;
		int res = 1;
		for (int v : g[u]) if (v != p) {
			leaf = false;
			childs.emplace_back(self(self, v, u));
			res += childs.back();
		}
		childs.emplace_back(N - res);
		for (int c : childs) ans += (ll)c * (N - c);
		return res;
	};
	dfs(dfs, 0, -1);
	
	ans += (ll)N * N;
	cout << ans << endl;
}