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
N=int(raw_input())
d=0
for x in xrange(105,N+1):
    if(x%2==0): continue
    div=2
    i=2
    while i<=(x//2+x%2) and div<9:
        div=div+(0,1)[x%i==0]
        i=i+1
    #print(div,x)    
    if(div==8): d=d+1    
print("%d"%d)    
