import java.util.Scanner;

public class Main{	
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		String s = sc.next();
		int num = 0;
		for(int i=0;i<s.length();i++){
			try{
				num+=Integer.parseInt(s.substring(i,i+1));
			}catch(Exception e){}
			num%=9;
		}
		if(num==0)
			System.out.println("Yes");
		else
			System.out.println("No");
		sc.close();
	}
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz