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
#include <cstdio>

int main (){
    int n;
    scanf("%d",&n);
    if(n<105) printf("0");
    else if(n<135) printf("1");
    else if(n<165) printf("2");
    else if(n<189) printf("3");
    else if(n<195) printf("4");
    else printf("5");
}