HW6.23

 public class Solution
 {
     public static void main(String[] args)
     {
         boolean[] box = new boolean[101];

         for(int i = 1; i <= 100; i++)
         {
             for(int j = i; j <= 100; j += i)
                 changeBox(box, j);
         }

         for(int i = 1; i <= 100; i++)
             System.out.printf("%d\t%b\n", i, box[i]);
     }

     public static void changeBox(boolean[] array, int flag)
     {
         if(array[flag] == true)
             array[flag] = false;
         else
             array[flag] = true;
     }
 }