import java.util.*;

public class Main {

    public static void main(String[] args){
        Scanner in = new Scanner(System.in);
        String s = in.next();

        int count = 0;
        for(int i = 0; i < s.length(); i++){
            count = (count + Integer.parseInt("" + s.charAt(i))) % 9;
        }
        if(count == 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 in = new Scanner(System.in);
        String s = in.next();

        int count = 0;
        for(int i = 0; i < s.length(); i++){
            count = (count + Integer.parseInt("" + s.charAt(i))) % 9;
        }
        if(count == 0)
            System.out.println("Yes");
        else
            System.out.println("No");
    }
} Main public static void main(String[] args){
        Scanner in = new Scanner(System.in);
        String s = in.next();

        int count = 0;
        for(int i = 0; i < s.length(); i++){
            count = (count + Integer.parseInt("" + s.charAt(i))) % 9;
        }
        if(count == 0)
            System.out.println("Yes");
        else
            System.out.println("No");
    } main {
        Scanner in = new Scanner(System.in);
        String s = in.next();

        int count = 0;
        for(int i = 0; i < s.length(); i++){
            count = (count + Integer.parseInt("" + s.charAt(i))) % 9;
        }
        if(count == 0)
            System.out.println("Yes");
        else
            System.out.println("No");
    } Scanner in = new Scanner(System.in); in new Scanner(System.in) String s = in.next(); s in.next() in.next in int count = 0; count 0 for(int i = 0; i < s.length(); i++){
            count = (count + Integer.parseInt("" + s.charAt(i))) % 9;
        } int i = 0; int i = 0; i 0 i < s.length() i s.length() s.length s i++ i++ i {
            count = (count + Integer.parseInt("" + s.charAt(i))) % 9;
        } {
            count = (count + Integer.parseInt("" + s.charAt(i))) % 9;
        } count = (count + Integer.parseInt("" + s.charAt(i))) % 9 count (count + Integer.parseInt("" + s.charAt(i))) % 9 (count + Integer.parseInt("" + s.charAt(i))) count Integer.parseInt("" + s.charAt(i)) Integer.parseInt Integer "" + s.charAt(i) "" s.charAt(i) s.charAt s i 9 if(count == 0)
            System.out.println("Yes");
        else
            System.out.println("No"); count == 0 count 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 in = new Scanner(System.in);
        String s = in.next();

        int count = 0;
        for(int i = 0; i < s.length(); i++){
            count = (count + Integer.parseInt("" + s.charAt(i))) % 9;
        }
        if(count == 0)
            System.out.println("Yes");
        else
            System.out.println("No");
    }
} public class Main {

    public static void main(String[] args){
        Scanner in = new Scanner(System.in);
        String s = in.next();

        int count = 0;
        for(int i = 0; i < s.length(); i++){
            count = (count + Integer.parseInt("" + s.charAt(i))) % 9;
        }
        if(count == 0)
            System.out.println("Yes");
        else
            System.out.println("No");
    }
} Main
import java.util.*;

public class Main {

    public static void main(String[] args){
        Scanner in = new Scanner(System.in);
        String s = in.next();

        int count = 0;
        for(int i = 0; i < s.length(); i++){
            count = (count + Integer.parseInt("" + s.charAt(i))) % 9;
        }
        if(count == 0)
            System.out.println("Yes");
        else
            System.out.println("No");
    }
}
