import java.util.*;
import java.lang.*;
import java.io.*;

public class Main {
	public static void main (String[] args) {
		//code
		Scanner in=new Scanner(System.in);
		int sum=0;
      	String s=in.nextLine();
      char ch[]=s.toCharArray();
      for(int i=0;i<s.length();i++)
      {
        	sum=sum+(int)(ch[i]-'0');
      }
      if(sum%9==0)
      {
        	System.out.println("Yes");
      }
      else
      {
        	System.out.println("No");
      }
}
} import java.util.*; util.* java import java.lang.*; lang.* java import java.io.*; io.* java public class Main {
	public static void main (String[] args) {
		//code
		Scanner in=new Scanner(System.in);
		int sum=0;
      	String s=in.nextLine();
      char ch[]=s.toCharArray();
      for(int i=0;i<s.length();i++)
      {
        	sum=sum+(int)(ch[i]-'0');
      }
      if(sum%9==0)
      {
        	System.out.println("Yes");
      }
      else
      {
        	System.out.println("No");
      }
}
} Main public static void main (String[] args) {
		//code
		Scanner in=new Scanner(System.in);
		int sum=0;
      	String s=in.nextLine();
      char ch[]=s.toCharArray();
      for(int i=0;i<s.length();i++)
      {
        	sum=sum+(int)(ch[i]-'0');
      }
      if(sum%9==0)
      {
        	System.out.println("Yes");
      }
      else
      {
        	System.out.println("No");
      }
} main {
		//code
		Scanner in=new Scanner(System.in);
		int sum=0;
      	String s=in.nextLine();
      char ch[]=s.toCharArray();
      for(int i=0;i<s.length();i++)
      {
        	sum=sum+(int)(ch[i]-'0');
      }
      if(sum%9==0)
      {
        	System.out.println("Yes");
      }
      else
      {
        	System.out.println("No");
      }
} Scanner in=new Scanner(System.in); in new Scanner(System.in) int sum=0; sum 0 String s=in.nextLine(); s in.nextLine() in.nextLine in char ch[]=s.toCharArray(); ch s.toCharArray() s.toCharArray s for(int i=0;i<s.length();i++)
      {
        	sum=sum+(int)(ch[i]-'0');
      } int i=0; int i=0; i 0 i<s.length() i s.length() s.length s i++ i++ i {
        	sum=sum+(int)(ch[i]-'0');
      } {
        	sum=sum+(int)(ch[i]-'0');
      } sum=sum+(int)(ch[i]-'0') sum sum+(int)(ch[i]-'0') sum (int)(ch[i]-'0') ch[i] ch i '0' 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("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) {
		//code
		Scanner in=new Scanner(System.in);
		int sum=0;
      	String s=in.nextLine();
      char ch[]=s.toCharArray();
      for(int i=0;i<s.length();i++)
      {
        	sum=sum+(int)(ch[i]-'0');
      }
      if(sum%9==0)
      {
        	System.out.println("Yes");
      }
      else
      {
        	System.out.println("No");
      }
}
} public class Main {
	public static void main (String[] args) {
		//code
		Scanner in=new Scanner(System.in);
		int sum=0;
      	String s=in.nextLine();
      char ch[]=s.toCharArray();
      for(int i=0;i<s.length();i++)
      {
        	sum=sum+(int)(ch[i]-'0');
      }
      if(sum%9==0)
      {
        	System.out.println("Yes");
      }
      else
      {
        	System.out.println("No");
      }
}
} Main
import java.util.*;
import java.lang.*;
import java.io.*;

public class Main {
	public static void main (String[] args) {
		//code
		Scanner in=new Scanner(System.in);
		int sum=0;
      	String s=in.nextLine();
      char ch[]=s.toCharArray();
      for(int i=0;i<s.length();i++)
      {
        	sum=sum+(int)(ch[i]-'0');
      }
      if(sum%9==0)
      {
        	System.out.println("Yes");
      }
      else
      {
        	System.out.println("No");
      }
}
}