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

int main()
{
	int n, m;
	cin >> n >> m;
	const int INF = INT32_MAX / 2;
	vector<vector<int>> mat( n, vector<int>( n, INF ) );
	for( int i = 0; i < n; i++ ) mat[i][i] = 0;
	for( int i = 0; i < m; i++ ) {
		int a, b;
		cin >> a >> b;
		a--;
		b--;
		mat[a][b] = 1;
		mat[b][a] = 1;
	}

	for( int k = 0; k < n; k++ ) {
		for( int i = 0; i < n; i++ ) {
			for( int j = 0; j < n; j++ ) {
				mat[i][j] = min( mat[i][j], mat[i][k] + mat[k][j] );
			}
		}
	}
	int ans = 0;
	for( int i = 0; i < n; i++ ) {
		for( int j = i + 1; j < n; j++ ) {
			for( int k = j + 1; k < n; k++ ) {
				if( mat[i][j] != 2 && mat[j][k] != 2 && mat[k][i] != 2 ) ans++;
			}
		}
	}

	cout << ans << endl;
}