N, M = map(int, input().split())
G = [ list() for i in range(N) ]
for i in range(M):
	a, b = map(int, input().split())
	G[a - 1].append(b - 1)
	G[b - 1].append(a - 1)
flag = [ [ False ] * N for i in range(N) ]
for i in range(N):
	for j in G[i]:
		for k in G[j]:
			flag[i][k] = True
for i in range(N):
	for j in G[i]:
		flag[i][j] = False
ans = 0
for i in range(N):
	for j in range(i):
		for k in range(j):
			if (not flag[i][j]) and (not flag[j][k]) and (not flag[k][i]):
				ans += 1
print(ans)