#include <bits/stdc++.h>
#ifdef LOCAL
#include "./debug.cpp"
#else
#define debug(...)
#define print_line
#endif
using namespace std;
using ll = long long;

int main() {
    int N;
    cin >> N;
    vector<pair<int, int>> E(N - 1);
    vector<ll> D(N);
    for (int i = 0; i < N - 1; i++) {
        int u, v;
        cin >> u >> v;
        u--;
        v--;
        E[i] = make_pair(u, v);
        D[u]++;
        D[v]++;
    }

    ll ans = 0;
    for (auto [u, v] : E) ans += (D[u] - 1) * (D[v] - 1);
    for (int i = 0; i < N; i++) ans += D[i] * (D[i] - 1) / 2;
    ans += N - 1;

    cout << ans << endl;
}