#include<bits/stdc++.h>
using namespace std;
#define int long long
#define REP(i,m,n) for(int i=(m);i<(n);i++)
#define rep(i,n) REP(i,0,n)
#define pb push_back
#define all(a) a.begin(),a.end()
#define rall(c) (c).rbegin(),(c).rend()
#define mp make_pair
#define endl '\n'
#define vec vector<ll>
#define mat vector<vector<ll> >
#define fi first
#define se second
#define double long double
typedef long long ll;
typedef unsigned long long ull;
typedef pair<ll,ll> pll;
//typedef long double ld;
typedef complex<double> Complex;
const ll INF=1e9+7;
const ll MOD=998244353;
const ll inf=INF*INF;
const ll mod=INF;
const ll MAX=140010;

vector<vector<ll> >G(MAX);
vector<ll>sz(MAX);
ll n;
ll ans=0;
ll dfs(ll i,ll p){
    sz[i]=1;
    for(auto e:G[i]){
        if(e==p)continue;
        sz[i]+=dfs(e,i);
    }
    ans+=sz[i]*(n-sz[i])*2LL;
    return sz[i];
}

signed main(){
    cin>>n;
    rep(i,n-1){
        ll a,b;cin>>a>>b;
        a--;b--;
        G[a].pb(b);
        G[b].pb(a);
    }
    dfs(0,-1);
    ans+=n*n;
    cout<<ans<<endl;
}