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

int main() {
    int N;
    cin >> N;
    vector<int> A(N), B(N);
    vector<vector<int>> G(N);
    for( int i = 0; i < N-1; i++ ) {
        cin >> A[i] >> B[i];
        A[i]--, B[i]--;
        G[A[i]].push_back(i);
        G[B[i]].push_back(i);
    }
    long long ans = N-1;
    for( int i = 0; i < N; i++ ) {
        long long deg = G[i].size();
        ans += deg*(deg-1)/2;
    }
    for( int i = 0; i < N-1; i++ ) {
        long long dega = G[A[i]].size();
        long long degb = G[B[i]].size();
        ans += (dega-1)*(degb-1);
    }
    cout << ans << endl;
}