N,M=map(int,input().split())
B=[set() for _ in range(N+1)]

for _ in range(M):
    a,b=map(int,input().split())
    B[a].add(b)
    B[b].add(a)

K=0
for i in range(1,N+1):
    for j in range(i+1,N+1):
        for k in range(j+1,N+1):

            F=True
            F&=(B[i] & B[j]==set()) or (j in B[i])
            F&=(B[j] & B[k]==set()) or (k in B[j])
            F&=(B[k] & B[i]==set()) or (i in B[k])
            K+=F

print(K)