K = input()

D = {}
for a in [2,3,5,7,11,13] :
    for b in [4,6,8,9,10,12] :
        calc = str(a*b)
        if calc not in D :
            D[calc] = 1
        else :
            D[calc] += 1

ans = D.get(K,0)/36
print(ans)