n1=[2,3,5,7,11,13]
n2=[4,6,8,9,10,12]
k=int(input())
ans=0
for i in range(6):
    for j in range(6):
        if n1[i]*n2[j]==k:
            ans=1
            break
if ans==1:
    print(1/36)
else:
    print(0)