# C
import math
import scipy.misc as scm

N = int(input())

if N == 0:
    print(1)
    quit()
if N == 1 or N == 2:
    print(2)
    quit()

arr = [[0 for j in range(int(math.log(N, 5))+1)] for i in range(int(math.log(N, 3))+1)]  # 1 indexed

ans = 2 + int(math.log(N, 5)) + int(math.log(N, 3))

for i in range(1, int(math.log(N, 3))+1):
    for j in range(1, int(math.log(N, 5))+1):
        if 3**i * 5**j <= N:
            ans += scm.comb(i+j, i, 1)

print(ans)