#ifdef LOGX
#define _GLIBCXX_DEBUG
#endif
#include <bits/stdc++.h>
using namespace std;
//#include <atcoder/all>
//using namespace atcoder;

/*---------macro---------*/
#define rep(i, n) for (int i = 0; i < (int)(n); ++i)
#define rep2(i, s, n) for (int i = s; i < (int)(n); ++i)
#define Clear(a) a = decltype(a)()
#define all(a) begin(a),end(a)
#define rall(a) rbegin(a),rend(a)
#define bit(i,j) (((i)>>(j))&1)

/*---------type/const---------*/
typedef long long ll;
typedef unsigned long long ull;
typedef string::const_iterator state; //構文解析
const ll big=1000000007;
//const ll big=998244353;
const double PI=acos(-1);
const double EPS=1e-8;//適宜変える
const int dx[4]={1,0,-1,0};
const int dy[4]={0,1,0,-1};
const char newl='\n';
struct{
    constexpr operator int(){return -int(1e9)-1;}
    constexpr operator ll(){return -ll(1e18)-1;}
}neginf;
struct{
    constexpr operator int(){return int(1e9)+1;}
    constexpr operator ll(){return ll(1e18)+1;}
    constexpr auto operator -(){return neginf;}
}inf;

/*---------debug用関数---------*/
#ifdef LOGX
#define dbg(x) cout << #x << ':',prt(x);
template<typename T> inline void prt(T a_);
template<typename T> inline void _prt(T a_);
template<typename A,typename B> inline void _prt(map<A,B> a_);
template<typename A,typename B> inline void _prt(unordered_map<A,B> a_);
template<typename T> inline void _prt(set<T> a_);
template<typename T> inline void _prt(unordered_set<T> a_);
template<typename A,typename B> inline void _prt(pair<A,B> a_);
template<typename T> inline void _prt(vector<T> &a_);
template<typename T> inline void _prt(vector<vector<T>> &a_);
//_prtでは改行しない.
inline void _prt(bool a_){if(a_)cout<<1;else cout<<0;}
inline void _prt(int a_){if(a_>=(int)inf)cout << "inf";else if(a_<=-(int)inf)cout << "-inf";else cout << a_;}
inline void _prt(long long a_){if(a_>=(ll)inf)cout << "INF";else if(a_<=-(ll)inf)cout << "-INF";else cout << a_;}
#ifdef ATCODER_MODINT_HPP
template<int MOD>inline void _prt(static_modint<MOD> x){cout << x.val();}
template<int MOD>inline void _prt(dynamic_modint<MOD> x){cout << x.val();}
#endif
template<typename T> inline void _prt(T a_){cout << a_;}
template<typename A,typename B>
inline void _prt(map<A,B> a_){cout<<'{';auto it=a_.begin();while(it!=a_.end()){_prt((*it).first);cout<<':';_prt((*(it++)).second);cout<<(it==a_.end() ? "":",");}cout<<'}';}
template<typename A,typename B>
inline void _prt(unordered_map<A,B> a_){cout<<'{';auto it=a_.begin();while(it!=a_.end()){_prt((*it).first);cout<<':';_prt((*(it++)).second);cout<<(it==a_.end() ? "":",");}cout<<'}';}
template<typename T>
inline void _prt(set<T> a_){cout<<'{';auto it=a_.begin();while(it!=a_.end()){_prt(*it++);cout<<(it==a_.end() ? "":",");}cout<<'}';}
template<typename T>
inline void _prt(unordered_set<T> a_){cout<<'{';auto it=a_.begin();while(it!=a_.end()){_prt(*it++);cout<<(it==a_.end() ? "":",");}cout<<'}';}
template<typename A,typename B>
inline void _prt(pair<A,B> a_){cout << '(';_prt(a_.first);cout << ',';_prt(a_.second);cout << ')';}
template<typename T>
inline void _prt(vector<T> &a_){cout<<'{';for(int i=0;i<(int)a_.size();i++){_prt(a_[i]);if(i+1<(int)a_.size())cout<<',';}cout<<'}';}
template<typename T>
inline void _prt(vector<vector<T>> &a_){cout<<"{\n";for(int i=0;i<(int)a_.size();i++){_prt(a_[i]);if(i+1<(int)a_.size())cout<<",\n";else cout<<"\n}";}}
template<typename T> inline void prt(T a_){_prt(a_);cout<<'\n';}
#else
#define dbg(x) ;
#define prt(x) ;
#define _prt(x) ;
#endif

/*---------function---------*/
template<typename T,typename U> T max(const T x,const U y){if(x>y)return x;else return y;}
template<typename T,typename U> T min(const T x,const U y){if(x<y)return x;else return y;}
template<typename T> T max(const vector<T> &a){T ans=a[0];for(T elem:a){ans=max(ans,elem);}return ans;}
template<typename T> T min(const vector<T> &a){T ans=a[0];for(T elem:a){ans=min(ans,elem);}return ans;}
template<typename T,typename U> bool chmin(T &a,const U b){if(a>b){a=b;return true;}return false;}
template<typename T,typename U> bool chmax(T &a,const U b){if(a<b){a=b;return true;}return false;}
template<typename T,typename U>
T expm(T x,U y,const ll mod=big){
    T res=1;
    while(y){
        if(y&1)(res*=x)%=mod;
        (x*=x)%=mod;
        y>>=1;
    }
    return res;
}
template<typename T,typename U>
T exp(T x,U y){
    T res=1;
    while(y){
        if(y&1)res*=x;
        x*=x;
        y>>=1;
    }
    return res;
}



int main(){
    ios::sync_with_stdio(false);
    std::cin.tie(nullptr);
    cout.precision(10);
    /*--------------------------------*/
    
    int N;cin >> N;
    vector<vector<int>> g(N);
    vector<vector<int>> sz(N);
    rep(i,N-1){
        int a,b;cin >> a >> b;
        g[a-1].emplace_back(b-1);
        g[b-1].emplace_back(a-1);
    }
    rep(i,N){
        sz[i].resize(g[i].size());
    }
    auto dfs=[&](auto &Self,int i,int p=-1)->int{
        int res=0;
        rep(j,g[i].size()){
            if(g[i][j]==p)continue;
            res+=sz[i][j]=Self(Self, g[i][j], i);
        }
        return res+1;
    };
    dfs(dfs, 0);
    auto dfs2=[&](auto &Self,int i,int p=-1,int val=0)->void{
        rep(j,g[i].size()){
            if(g[i][j]==p)sz[i][j]=val;
        }
        int sum=0;
        rep(j,g[i].size()){
            sum+=sz[i][j];
        }
        rep(j,g[i].size()){
            if(g[i][j]==p)continue;
            Self(Self,g[i][j],i,sum-sz[i][j]+1);
        }
    };
    dfs2(dfs2, 0);
    dbg(sz);
    ll ans=0;
    rep(i,N){
        for(auto val:sz[i])ans+=(val+1)*ll(N-val);
    }
    ans+=N;
    cout << ans << newl;
}