#include<stdio.h>
int v[102][102];
int main()
{
	int n, m;
	scanf("%d %d", &n, &m);
	int a, b;
	int i, j, k;
	for (i = 0; i < n; i++)
		for (j = 0; j < n; j++)
			v[i][j] = 5;
	for (i = 0; i < n; i++)
		v[i][i] = 0;
	for (i = 0; i < m; i++)
	{
		scanf("%d %d", &a, &b);
		v[a - 1][b - 1] = 1;
		v[b - 1][a - 1] = 1;
	}
	for (i = 0; i < n; i++)
	{
		for (j = 0; j < n; j++)
		{
			if (v[i][j] < 2)
				continue;
			for (k = 0; k < n; k++)
				if (v[i][k] == 1 && v[k][j] == 1)
					v[i][j] = 2;
		}
	}
	int ans = 0;
	for (i = 0; i < n; i++)
		for (j = i + 1; j < n; j++)
			for (k = j + 1; k < n; k++)
				if (v[i][j] != 2 && v[j][k] != 2 && v[k][i] != 2)
					ans++;
	printf("%d\n", ans);
	return 0;
}