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

int main(){
    int n; cin >> n;
    vector<ll> deg(n,0);
    vector<pair<int,int>> es(n-1);
    for (int i = 0; i < n-1; i++){
        int u, v; cin >> u >> v; u--, v--;
        deg[u]++;
        deg[v]++;
        es[i] = pair(u,v);
    }
    ll ans = n-1;
    for (int v = 0; v < n; v++){
        ans += deg[v] * (deg[v]-1) / 2;
    }
    for (auto [u, v] : es){
        ans += (deg[u] - 1) * (deg[v] - 1);
    }
    cout << ans << endl;
}