View Code of Problem 20

    import java.util.Scanner;
     
     
    public class Main {
    	public static void main(String[] args) {
    		Scanner scanner = new Scanner(System.in);
    		while(scanner.hasNext()) {
    			int x = scanner.nextInt();
    			if( x%3 ==0 ) {
    				System.out.println("No");
    			}else {
    				System.out.println("Yes");
    			}
    		}
    		
    		scanner.close();
    	}
    	
    }