#include<bits/stdc++.h>
using namespace std;
using ll=long long;

int main(){
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  int N;
  cin>>N;
  vector G(N,vector(0,0));
  vector D(N,0ll);
  for(int i=0;i<N-1;i++){
    int U,V;
    cin>>U>>V;
    --U,--V;
    G[U].push_back(V);
    G[V].push_back(U);
    D[U]+=1;
    D[V]+=1;
  }
  ll ans=0;
  for(int i=0;i<N;i++){
    ans+=D[i];
    ans+=D[i]*(D[i]-1);
    for(int v:G[i]){
      ans+=(D[i]-1)*(D[v]-1);
    }
  }
  ans/=2;
  cout<<ans<<'\n';
}