#include <bits/stdc++.h>
//#include <atcoder/all>
using namespace std;
//using namespace atcoder;
//using mint = atcoder::modint;
//int mod;
//using mint = modint998244353;
//const int mod = 998244353;
//const int INF = 1e9;
//const long long LINF = 1e18;
//const bool debug = false;
#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 endl "\n"
#define P pair<long long,long long>
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; }
struct ReRooting {
	struct Edge {
		int to;
		Edge(int _to) :to(_to) {}
	};
	struct Data {
		long long main;
		long long sub;
		Data() :main(1), sub(0) {}
		Data(long long _main, long long _sub) : main(_main), sub(_sub) {}
	};
	vector<vector<Edge>>g;
	vector<Data>dp;
	vector<Data>ans;
	int sz;
	ReRooting(int _sz) :sz(_sz) {
		g.resize(sz);
		dp.reserve(sz);
		ans.resize(sz);
	}
	void ReadGraph() {
		rep(i, sz - 1) {
			int a, b; cin >> a >> b; a--; b--;
			g[a].push_back({ b });
			g[b].push_back({ a });
		}
	}
	Data  merge(const Data &lh, const Data &rh) {
		Data ret = lh;
		ret.main += rh.main;
		ret.sub += rh.main + rh.sub;
		return ret;
	}
	Data  mergeSub(const Data &lh, const Data &rh) {
		Data ret = lh;
		ret.main += rh.main + 1;
		ret.sub += rh.sub;
		return ret;
	}
	void dfs(int v, int p = -1) {
		Data val(1, 0);
		for (auto e : g[v]) {
			if (p == e.to)continue;
			dfs(e.to, v);
			val = merge(val, dp[e.to]);
		}
		dp[v] = val;
	}
	void dfsR(int v, int p) {
		for (auto e : g[v]) ans[v] = merge(ans[v], dp[e.to]);
		vector<Data>vdata;
		for (auto e : g[v]) vdata.push_back(dp[e.to]);
		int sz = vdata.size();
		vector<Data>sumL(sz + 1), sumR(sz + 1);
		sumL[0] = { 0,0 }; sumR[0] = { 0,0 };
		rep(i, sz)sumL[i + 1] = merge(sumL[i], vdata[i]);
		rep(i, sz)sumR[i + 1] = merge(sumR[i], vdata[sz - i - 1]);
		for (int i = 0; i < g[v].size(); ++i) {
			auto e = g[v][i];
			if (p == e.to)continue;
			dp[v] = mergeSub(sumL[i], sumR[sz - (i + 1)]);
			dfsR(e.to, v);
		}
	}
	void output() {
		long long out = 0;
		rep(i, sz) out += ans[i].main + ans[i].sub;
		cout << out << endl;
	}
	void solve() {
		ReadGraph();
		dfs(0);
		dfsR(0, -1);
		output();
	}
};
int main() {
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	int n; cin >> n;
	ReRooting reroot(n);
	reroot.solve();
	return 0;
}