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,Ans=0;
    scanf("%d",&N);
    for(int i=1;i<=N;i+=2){
        int cnt=0;
        for(int j=1;j<=i;j++)
            cnt+=i%j==0;
        Ans+=cnt==8;
    }
    printf("%d",Ans);
}
