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.Linq;
using System.Collections.Generic;
using System.IO;

namespace atcorder1
{
    class MainClass
    {
        public static long Read()
        {
            return long.Parse(Console.ReadLine());
        }

        public static long[] Reads()
        {
                        return Console.ReadLine().Split().Select(long.Parse).ToArray();
        }
        public static void Main(string[] args)
        {
            var sw = new StreamWriter(Console.OpenStandardOutput()) { AutoFlush = false };
            Console.SetOut(sw);
            var n = Read();

            if (n < 105)
                Console.WriteLine(0);
            else if (n < 135)
                Console.WriteLine(1);
            else if (n < 165)
                Console.WriteLine(2);
            else if (n < 189)
                Console.WriteLine(3);
            else if (n < 195)
                Console.WriteLine(4);
            else
                Console.WriteLine(5);


                Console.Out.Flush();
        }
    }
}