#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
  #include "settings/debug.cpp"
#else
  #define Debug(...) void(0)
#endif
#define rep(i, n) for (int i = 0; i < (n); ++i)
using ll = long long;
using ull = unsigned long long;

int main() {
  int n;
  cin >> n;
  vector<pair<int, int>> Edges(n - 1);
  vector<ll> deg(n, 0);
  rep(i, n - 1) {
    int a, b;
    cin >> a >> b;
    --a, --b;
    Edges[i] = { a, b };
    deg[a]++, deg[b]++;
  }
  ll ans = 0;
  ans += n - 1;
  rep(i, n) ans += deg[i] * (deg[i] - 1) / 2;
  rep(i, n - 1) {
    auto [a, b] = Edges[i];
    ans += (deg[a] - 1) * (deg[b] - 1);
  }
  cout << ans << endl;
  return 0;
}