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 <stdlib.h>
//#include <limits.h>
//#include <math.h>

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