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();
	}
} import java.util.Scanner; Scanner java.util 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();
	}
} 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();
	} main {
		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();
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String s = sc.next(); s sc.next() sc.next sc int num = 0; num 0 for(int i=0;i<s.length();i++){
			try{
				num+=Integer.parseInt(s.substring(i,i+1));
			}catch(Exception e){}
			num%=9;
		} int i=0; int i=0; i 0 i<s.length() i s.length() s.length s i++ i++ i {
			try{
				num+=Integer.parseInt(s.substring(i,i+1));
			}catch(Exception e){}
			num%=9;
		} {
			try{
				num+=Integer.parseInt(s.substring(i,i+1));
			}catch(Exception e){}
			num%=9;
		} try{
				num+=Integer.parseInt(s.substring(i,i+1));
			}catch(Exception e){} catch(Exception e){} Exception e {} {
				num+=Integer.parseInt(s.substring(i,i+1));
			} num+=Integer.parseInt(s.substring(i,i+1)) num Integer.parseInt(s.substring(i,i+1)) Integer.parseInt Integer s.substring(i,i+1) s.substring s i i+1 i 1 num%=9 num 9 if(num==0)
			System.out.println("Yes");
		else
			System.out.println("No"); num==0 num 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" sc.close() sc.close sc String[] args args 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();
	}
} 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();
	}
} Main
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();
	}
}