import sys
readline = sys.stdin.readline

N, M = map(int, readline().split())
S = set()
inf = 10 ** 18
G = [[inf] * N for i in range(N)]
for i in range(M):
    a, b = map(int, readline().split())
    a, b = a - 1, b - 1
    G[a][b] = 1
    G[b][a] = 1
    
for k in range(N):
    for i in range(N):
        for j in range(N):
            G[i][j] = min(G[i][j], G[i][k] + G[k][j])
ans = N * (N - 1) * (N - 2)//6
for i in range(N):
    for j in range(i + 1, N):
        for k in range(j + 1, N):
            if G[i][j] == 2 or G[j][k] == 2 or G[k][i] == 2:
                ans -= 1
print(ans)