from collections import defaultdict
k = int(input())
dice1 = [2, 3, 5, 7, 11, 13]
dice2 = [4, 6, 8, 9, 10, 12]
table = defaultdict(int)

for i in dice1:
	for j in dice2:
		table[i*j] += 1

print(table[k]/36)