import java.util.Scanner;

public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		String string = sc.next();
		int ans=0;
		for(int i=0;i<string.length();i++){
			ans=ans+Integer.parseInt(string.substring(i,i+1));
			if(ans>=9){ans=ans-9;}
		}
		if(ans==0){System.out.println("Yes");}
		else{System.out.println("No");}
	}
}
/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