using System;
public class Program
{
int N = 1000;
public void Main()
int numberOfPrimes = 0;
for(int number=2;number<=N;number++)
int numberOfDivisors = 0;
for(int divisor=1;divisor<=number;divisor++)
if( number % divisor == 0 )
numberOfDivisors++;
}
if(numberOfDivisors == 2)
numberOfPrimes++;
Console.WriteLine(numberOfPrimes + " should be 168");