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 n=scanner.nextInt();
			
			if (n%3==0) {
				System.out.println("No");
			}else {
				System.out.println("Yes");
			}
		}
		scanner.close();
	}
}