HW5.26

 public class Solution
 {
     public static void main(String[] args)
     {
         int totalCount = 0;
         int lineCount = 0;
         int i = 2;

         while(true)
         {
             if(isPrime(i) && isPalindrome(i))
             {
                 System.out.print(i + " ");
                 totalCount++;
                 lineCount++;
             }

             i++;

             if(lineCount == 10)
             {
                 System.out.println();
                 lineCount = 0;
             }

             if(totalCount == 100)
                 break;
         }
     }

     public static boolean isPrime(int number)
     {
         if(number == 1)
             return false;
         else if(number == 2)
             return true;
         else
         {
             for(int i = 2; i < number; i++)
             {
                 if(number % i == 0)
                     return false;
             }
             return true;
         }
     }

     public static int reverse(int number)
     {
         String strOfNumber = "";
         if(number < 10)
             strOfNumber += number + "";
         else
             strOfNumber += "" + number % 10 + reverse(number / 10);
         return Integer.parseInt(strOfNumber);
     }

     public static boolean isPalindrome(int number)
     {
         int backupNumber = reverse(number);
         if(number == backupNumber)
             return true;
         else
             return false;
     }
 }