Anthony and Diablo

import java.util.Scanner;

public class Kattistry {
 public static void main(String[] args)  {
     Scanner scan= new Scanner (System.in);
     float a= scan.nextFloat();
     float b= scan.nextFloat();
     
     float r = (float) ((b/ Math.PI)/2) ;
     float c= (float) (Math.PI * Math.pow(r, 2));
     
     
     if ( c >= a) {
         System.out.println("Diablo is happy!");
     }
     else{
         System.out.println("Need more materials!");
     }
     
    
    
    
            
 }}