a = [8,12,16,18,20,24,12,18,24,27,30,36,20,30,40,45,50,60,28,42,56,63,70,84,44,66,88,99,110,132,52,78,104,117,130,156]
k = int(input())
c = a.count(k)
if c==0:
    print(0)
else:
    print(c/36)