#include<bits/stdc++.h>
using namespace std;
#include <atcoder/all>
using namespace atcoder;
using mint=modint998244353; //1000000007;
using ll=long long;
using pp=pair<ll,ll>;
#define sr string 
#define vc vector
#define fi first
#define se second
#define rep(i,n) for(ll i=0;i<(ll)n;i++)
#define pb push_back
#define all(v) v.begin(),v.end()
#define pque priority_queue
#define bpc(a) __builtin_popcount(a)
int main(){
  ll n;cin>>n;
  vc v(n,vc<ll>(0));
  rep(i,n-1){
    ll a,b;cin>>a>>b;
    a--;b--;
    v[a].pb(b); v[b].pb(a);
  }
  ll ans=n*n*n;
  auto f=[&](auto f,ll a,ll p)->ll{
    ll res=1;
    for(auto au:v[a])if(au!=p){
      ll x=f(f,au,a);
      ans-=(ll)x*x;
      res+=x;
    }
    ans-=(ll)(n-res)*(n-res);
    return res;
  };
  f(f,0,-1);
  cout<<ans;
}