M, D   = map(int, input().split())ans=0
for i in range(M):
    m=i+1
    for j in range(D):
        d=j+1
        d1=d%10
        d10=d//10
        if d1>=2 and d10>=2 and m==d10*d1:
            ans+=1
#             print(m,d)
print(ans)