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;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;


/*Please dont change namespace, Dcoder 
and class must not be public*/

//Compiler version 4.0, .NET Framework 4.5


namespace Dcoder
{
public class Program
{
public static void Main(string[] args)
{
Method(args);
}

public static void Method(string[] args)
{
int n=int.Parse(Console.ReadLine());
int allPat=0;
for(int i=1;i<=n;i+=2){
	int cnt=0;
	for(int j=1;j<=i;j++){
		if(i%j==0)cnt++;
	}
	if(cnt==8)allPat++;
}
Console.WriteLine(allPat);
}
}
}