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 Go (1.6) (judge verdict: Accepted)

package main

import "fmt"

func countDivisor(n int) (x int) {
	for i := 1; i <= n; i++ {
		if n%i == 0 {
			x++
		}
	}
	return x
}

func main() {
	var n int
	fmt.Scan(&n)
	var ans int
	for i := 1; i <= n; i = i + 2 {
		if countDivisor(i) == 8 {
			ans++
		}
	}
	fmt.Println(ans)
}