/*
TASK:tri
LANG:C++
*/
#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
#include <math.h>
#include <stdlib.h>
#define FOR(i,n) for(i=0;i<n;i++)
#define FoR(i,n) for(i=n-1;i>=0;i--)
#define pb push_back
using namespace std;

int a[501][501],br=0;

int main()
{
    int N;
    int i,j,l,k,curr;
    i=1;
    j=1;
    cin >> N;
    
    while(i+j)
    {
        cin >> i >> j;
        if (i==0 && j==0) break;
        a[i-1][j-1]=1;
        a[j-1][i-1]=1;
    }
    /*FOR(i,N)
    {
        FOR(j,N)
            cout << a[i][j] << " ";
        cout << endl;
    }*/
    
    FOR(i,N)
        FOR(j,N)
            if (a[i][j]==1)
            {
                curr=j;
                for (l=i+1;l<N;l++)
                    if (a[i][l]==1)
                        if (a[l][curr]==1) br++;
            }
    br/=3;
    cout << br << endl;
return 0;
}
                        
                 
