from math import floor

n = int(input())

memo = {}

def a(i):
	
	if i in memo:
		return memo[i]
	else:
		memo[i] = a_inner(i)
		return memo[i]
	

def a_inner(i):
	
	if i == 0:
		return 1
	else:
		i3 = floor(i / 3)
		i5 = floor(i / 5)	
		return a(i3) + a(i5)
	
print(a(n))