import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
        char[] N = sc.next().toCharArray();
        int res=0;
        
        for(int i=0; i<N.length; i++){
            res = (res + Character.getNumericValue(N[i]))%9;
        }
        
        if(res%9==0){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
        
        
        
        
        }
    } import java.util.*; util.* java public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
        char[] N = sc.next().toCharArray();
        int res=0;
        
        for(int i=0; i<N.length; i++){
            res = (res + Character.getNumericValue(N[i]))%9;
        }
        
        if(res%9==0){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
        
        
        
        
        }
    } Main public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
        char[] N = sc.next().toCharArray();
        int res=0;
        
        for(int i=0; i<N.length; i++){
            res = (res + Character.getNumericValue(N[i]))%9;
        }
        
        if(res%9==0){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
        
        
        
        
        } main {
		Scanner sc = new Scanner(System.in);
        char[] N = sc.next().toCharArray();
        int res=0;
        
        for(int i=0; i<N.length; i++){
            res = (res + Character.getNumericValue(N[i]))%9;
        }
        
        if(res%9==0){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
        
        
        
        
        } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) char[] N = sc.next().toCharArray(); N sc.next().toCharArray() sc.next().toCharArray sc.next() sc.next sc int res=0; res 0 for(int i=0; i<N.length; i++){
            res = (res + Character.getNumericValue(N[i]))%9;
        } int i=0; int i=0; i 0 i<N.length i N.length N N.length i++ i++ i {
            res = (res + Character.getNumericValue(N[i]))%9;
        } {
            res = (res + Character.getNumericValue(N[i]))%9;
        } res = (res + Character.getNumericValue(N[i]))%9 res (res + Character.getNumericValue(N[i]))%9 (res + Character.getNumericValue(N[i])) res Character.getNumericValue(N[i]) Character.getNumericValue Character N[i] N i 9 if(res%9==0){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        } res%9==0 res%9 res 9 0 {
            System.out.println("Yes");
        } System.out.println("Yes") System.out.println System.out System System.out "Yes" {
            System.out.println("No");
        } System.out.println("No") System.out.println System.out System System.out "No" String[] args args public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
        char[] N = sc.next().toCharArray();
        int res=0;
        
        for(int i=0; i<N.length; i++){
            res = (res + Character.getNumericValue(N[i]))%9;
        }
        
        if(res%9==0){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
        
        
        
        
        }
    } public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
        char[] N = sc.next().toCharArray();
        int res=0;
        
        for(int i=0; i<N.length; i++){
            res = (res + Character.getNumericValue(N[i]))%9;
        }
        
        if(res%9==0){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
        
        
        
        
        }
    } Main
import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
        char[] N = sc.next().toCharArray();
        int res=0;
        
        for(int i=0; i<N.length; i++){
            res = (res + Character.getNumericValue(N[i]))%9;
        }
        
        if(res%9==0){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
        
        
        
        
        }
    }