Problem:
Score: 200 points

Problem Statement

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.

Sample Input 1

105

Sample Output 1

1

Among the numbers between 1 and 105, the only number that is odd and has exactly eight divisors is 105.

Sample Input 2

7

Sample Output 2

0

1 has one divisor. 3, 5 and 7 are all prime and have two divisors. Thus, there is no number that satisfies the condition.

Solution in C (GCC 5.4.1) (judge verdict: Accepted)

#include <stdio.h>
#include <math.h>
#include <stdlib.h>

int main(void)
{
    int n,i,t,cnt,ans=0;

    scanf("%d",&n);

    for(i=1;i<=n;i=i+2){
        t=1;
        cnt=0;
        while(t<=i){
            if(i%t==0){
                cnt++;
            }
            t++;
        }
        if(cnt==8){
            ans++;
        }
    }
     
    printf("%d\n",ans);

}