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<string.h>
int main(){
	
	
	int x, y, i, j, flag, number=0;
	scanf("%d", &x);
	
	for(flag=0, i=1; i<=x; i+=2){
		for(j=1; j<=i; j++){
			if(i%j == 0){
				flag++;
			}
		}
		
		if(flag==8){
				number ++;
		}
		
		flag=0;
	}
	
	printf("%d\n", number);
	

return 0;	
}