import java.math.BigInteger;
import java.util.*;
public class Main{
	public static void main(String[] args){
        Scanner sc= new Scanner(System.in);
        BigInteger n = sc.nextBigInteger();
        String s = String.valueOf(n);
        int sum =0;
        for(char c:s.toCharArray())
            sum += Integer.parseInt(String.valueOf(c));
        if(sum%9==0)
         	System.out.println("Yes");
         else
         	System.out.println("No");
  	}
}
 import java.math.BigInteger; BigInteger java.math import java.util.*; util.* java public class Main{
	public static void main(String[] args){
        Scanner sc= new Scanner(System.in);
        BigInteger n = sc.nextBigInteger();
        String s = String.valueOf(n);
        int sum =0;
        for(char c:s.toCharArray())
            sum += Integer.parseInt(String.valueOf(c));
        if(sum%9==0)
         	System.out.println("Yes");
         else
         	System.out.println("No");
  	}
} Main public static void main(String[] args){
        Scanner sc= new Scanner(System.in);
        BigInteger n = sc.nextBigInteger();
        String s = String.valueOf(n);
        int sum =0;
        for(char c:s.toCharArray())
            sum += Integer.parseInt(String.valueOf(c));
        if(sum%9==0)
         	System.out.println("Yes");
         else
         	System.out.println("No");
  	} main {
        Scanner sc= new Scanner(System.in);
        BigInteger n = sc.nextBigInteger();
        String s = String.valueOf(n);
        int sum =0;
        for(char c:s.toCharArray())
            sum += Integer.parseInt(String.valueOf(c));
        if(sum%9==0)
         	System.out.println("Yes");
         else
         	System.out.println("No");
  	} Scanner sc= new Scanner(System.in); sc new Scanner(System.in) BigInteger n = sc.nextBigInteger(); n sc.nextBigInteger() sc.nextBigInteger sc String s = String.valueOf(n); s String.valueOf(n) String.valueOf String n int sum =0; sum 0 for(char c:s.toCharArray())
            sum += Integer.parseInt(String.valueOf(c)); char c s.toCharArray() s.toCharArray s sum += Integer.parseInt(String.valueOf(c)); sum += Integer.parseInt(String.valueOf(c)) sum Integer.parseInt(String.valueOf(c)) Integer.parseInt Integer String.valueOf(c) String.valueOf String c if(sum%9==0)
         	System.out.println("Yes");
         else
         	System.out.println("No"); sum%9==0 sum%9 sum 9 0 System.out.println("Yes") System.out.println System.out System System.out "Yes" 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);
        BigInteger n = sc.nextBigInteger();
        String s = String.valueOf(n);
        int sum =0;
        for(char c:s.toCharArray())
            sum += Integer.parseInt(String.valueOf(c));
        if(sum%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);
        BigInteger n = sc.nextBigInteger();
        String s = String.valueOf(n);
        int sum =0;
        for(char c:s.toCharArray())
            sum += Integer.parseInt(String.valueOf(c));
        if(sum%9==0)
         	System.out.println("Yes");
         else
         	System.out.println("No");
  	}
} Main
import java.math.BigInteger;
import java.util.*;
public class Main{
	public static void main(String[] args){
        Scanner sc= new Scanner(System.in);
        BigInteger n = sc.nextBigInteger();
        String s = String.valueOf(n);
        int sum =0;
        for(char c:s.toCharArray())
            sum += Integer.parseInt(String.valueOf(c));
        if(sum%9==0)
         	System.out.println("Yes");
         else
         	System.out.println("No");
  	}
}

