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# (Mono 4.6.2.0) (judge verdict: Accepted)

using System;

public class Hello
{
    public static void Main()
    {
        var n = int.Parse(Console.ReadLine().Trim());
        if (n <= 104) { Console.WriteLine(0); goto end; }
        if (n == 105) { Console.WriteLine(1); goto end; }
        var res = 0;
        for (int i = 10; i <= n; i++)
        {
            if (i % 2 == 1)
            {
                var count = 0;
                for (int j = 1; j <= n; j++)
                    if (i % j == 0) count++;
                if (count == 8) res++;
            }
        }
        Console.WriteLine(res);
        end:;
    }
}