import java.util.*;

public class Main {
    
    public static void main(String[] args) {

        Scanner sc = null;
        sc = new Scanner(System.in);
        String n = sc.next();
        sc.close();
        String c = null;
        long sum = 0;
        for (int i=0; i < n.length(); i++) {
            c = n.substring(i, i + 1);
            sum += Long.parseLong(c);

        }
        if (sum % 9 == 0 || sum == 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 = null;
        sc = new Scanner(System.in);
        String n = sc.next();
        sc.close();
        String c = null;
        long sum = 0;
        for (int i=0; i < n.length(); i++) {
            c = n.substring(i, i + 1);
            sum += Long.parseLong(c);

        }
        if (sum % 9 == 0 || sum == 0) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }

    }
} Main public static void main(String[] args) {

        Scanner sc = null;
        sc = new Scanner(System.in);
        String n = sc.next();
        sc.close();
        String c = null;
        long sum = 0;
        for (int i=0; i < n.length(); i++) {
            c = n.substring(i, i + 1);
            sum += Long.parseLong(c);

        }
        if (sum % 9 == 0 || sum == 0) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }

    } main {

        Scanner sc = null;
        sc = new Scanner(System.in);
        String n = sc.next();
        sc.close();
        String c = null;
        long sum = 0;
        for (int i=0; i < n.length(); i++) {
            c = n.substring(i, i + 1);
            sum += Long.parseLong(c);

        }
        if (sum % 9 == 0 || sum == 0) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }

    } Scanner sc = null; sc null sc = new Scanner(System.in) sc new Scanner(System.in) String n = sc.next(); n sc.next() sc.next sc sc.close() sc.close sc String c = null; c null long sum = 0; sum 0 for (int i=0; i < n.length(); i++) {
            c = n.substring(i, i + 1);
            sum += Long.parseLong(c);

        } int i=0; int i=0; i 0 i < n.length() i n.length() n.length n i++ i++ i {
            c = n.substring(i, i + 1);
            sum += Long.parseLong(c);

        } {
            c = n.substring(i, i + 1);
            sum += Long.parseLong(c);

        } c = n.substring(i, i + 1) c n.substring(i, i + 1) n.substring n i i + 1 i 1 sum += Long.parseLong(c) sum Long.parseLong(c) Long.parseLong Long c if (sum % 9 == 0 || sum == 0) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        } sum % 9 == 0 || sum == 0 sum % 9 == 0 sum % 9 sum 9 0 sum == 0 sum 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 = null;
        sc = new Scanner(System.in);
        String n = sc.next();
        sc.close();
        String c = null;
        long sum = 0;
        for (int i=0; i < n.length(); i++) {
            c = n.substring(i, i + 1);
            sum += Long.parseLong(c);

        }
        if (sum % 9 == 0 || sum == 0) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }

    }
} public class Main {
    
    public static void main(String[] args) {

        Scanner sc = null;
        sc = new Scanner(System.in);
        String n = sc.next();
        sc.close();
        String c = null;
        long sum = 0;
        for (int i=0; i < n.length(); i++) {
            c = n.substring(i, i + 1);
            sum += Long.parseLong(c);

        }
        if (sum % 9 == 0 || sum == 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 = null;
        sc = new Scanner(System.in);
        String n = sc.next();
        sc.close();
        String c = null;
        long sum = 0;
        for (int i=0; i < n.length(); i++) {
            c = n.substring(i, i + 1);
            sum += Long.parseLong(c);

        }
        if (sum % 9 == 0 || sum == 0) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }

    }
}