The number 105 is quite special - it is odd but still it has eight divisors. Now, your task is this: how many odd numbers with exactly eight positive divisors are there between 1 and N (inclusive)?

Constraints

* N is an integer between 1 and 200 (inclusive).

Input

Input is given from Standard Input in the following format:


N


Output

Print the count.

Examples

Input

105


Output

1


Input

7


Output

0
#coding: utf-8
import math

n = int(raw_input())
y_list = [[]]
cnt = 0
cnt_y = 0

for i in range(1,n+1,2):
    ri = (i>>1) 
    for j in range(3,ri,2):
        if i%j == 0: cnt_y += 1
    if cnt_y + 2 == 8: cnt += 1
    cnt_y = 0

print cnt
