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 calc(n int) int {                      
        ans := 0                            
        for i := 1; i <= n/2; i++ {         
                if n%i == 0 {               
                        ans += 1            
                }                           
        }                                   
        return ans + 1                      
}                                           
func main() {                               
        var N int                           
        fmt.Scanf("%d", &N)                 
                                            
        ans := 0                            
        for i := 105; i <= N; i = i + 2 {         
                if calc(i) == 8 {           
                        ans += 1            
                }                           
        }                                   
        fmt.Println(ans)                    
}