#include <bits/stdc++.h>
using namespace std;
int main(){
  int N;
  cin >> N;
  vector<vector<int>> E(N);
  for (int i = 0; i < N - 1; i++){
    int u, v;
    cin >> u >> v;
    u--;
    v--;
    E[u].push_back(v);
    E[v].push_back(u);
  }
  long long ans = 0;
  ans += N - 1;
  for (int i = 0; i < N; i++){
    ans += (long long) E[i].size() * (E[i].size() - 1) / 2;
  }
  for (int i = 0; i < N; i++){
    for (int j : E[i]){
      if (i < j){
        ans += (long long) (E[i].size() - 1) * (E[j].size() - 1);
      }
    }
  }
  cout << ans << endl;
}