import java.util.Scanner;

public class Main {

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

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String n = sc.next();
        int sum = 0;
        for (int i = 0, len = n.length(); i < len; i++) {
            sum += Integer.parseInt(String.valueOf(n.charAt(i)));
        }
        if ((sum % 9) == 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 n = sc.next();
        int sum = 0;
        for (int i = 0, len = n.length(); i < len; i++) {
            sum += Integer.parseInt(String.valueOf(n.charAt(i)));
        }
        if ((sum % 9) == 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 n = sc.next();
        int sum = 0;
        for (int i = 0, len = n.length(); i < len; i++) {
            sum += Integer.parseInt(String.valueOf(n.charAt(i)));
        }
        if ((sum % 9) == 0) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
        sc.close();
    }
}