public static void main(String[] args){
        System.out.println(0xFFFF);
        System.out.println(0_345_345);
        System.out.println(0B1111_1111_1101);
        int[][] arr = new int[4][4];
        for(int i = 0; i<arr.length; i++)
            for(int j = 0; j<arr[i].length; j++)
                arr[i][j]= (i!=0 ? arr[i-1][arr[i].length-1] +j : j) + (i>1 ? 1:i);
        for(int i=0; i<arr.length; i++)
            for(int j=0; j<arr[i].length; j++)
                System.out.print(arr[i][j]+(j%arr[i].length==arr[i].length-1 ? "\n" : " "));
        String hello = "Hello", lo = "lo";
        System.out.println(hello == ("Hel" + lo).intern()+ " ");
//        System.out.println((Other.hello == hello) + " ");
  //      System.out.println((other.Other.hello == hello) + " ");
    }