import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String n = sc.next();
        if ("0".equals(n)) {
            System.out.println("Yes");
        } else {
            long sum = 0;
            for (int i = 0; i < n.length(); i++) {
                sum += Integer.parseInt(n.substring(i, i + 1));
            }
            System.out.println((sum % 9 == 0) ? "Yes" : "No");
        }

    }
} 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();
        if ("0".equals(n)) {
            System.out.println("Yes");
        } else {
            long sum = 0;
            for (int i = 0; i < n.length(); i++) {
                sum += Integer.parseInt(n.substring(i, i + 1));
            }
            System.out.println((sum % 9 == 0) ? "Yes" : "No");
        }

    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String n = sc.next();
        if ("0".equals(n)) {
            System.out.println("Yes");
        } else {
            long sum = 0;
            for (int i = 0; i < n.length(); i++) {
                sum += Integer.parseInt(n.substring(i, i + 1));
            }
            System.out.println((sum % 9 == 0) ? "Yes" : "No");
        }

    } main {
        Scanner sc = new Scanner(System.in);
        String n = sc.next();
        if ("0".equals(n)) {
            System.out.println("Yes");
        } else {
            long sum = 0;
            for (int i = 0; i < n.length(); i++) {
                sum += Integer.parseInt(n.substring(i, i + 1));
            }
            System.out.println((sum % 9 == 0) ? "Yes" : "No");
        }

    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String n = sc.next(); n sc.next() sc.next sc if ("0".equals(n)) {
            System.out.println("Yes");
        } else {
            long sum = 0;
            for (int i = 0; i < n.length(); i++) {
                sum += Integer.parseInt(n.substring(i, i + 1));
            }
            System.out.println((sum % 9 == 0) ? "Yes" : "No");
        } "0".equals(n) "0".equals "0" n {
            System.out.println("Yes");
        } System.out.println("Yes") System.out.println System.out System System.out "Yes" {
            long sum = 0;
            for (int i = 0; i < n.length(); i++) {
                sum += Integer.parseInt(n.substring(i, i + 1));
            }
            System.out.println((sum % 9 == 0) ? "Yes" : "No");
        } long sum = 0; sum 0 for (int i = 0; i < n.length(); i++) {
                sum += Integer.parseInt(n.substring(i, i + 1));
            } int i = 0; int i = 0; i 0 i < n.length() i n.length() n.length n i++ i++ i {
                sum += Integer.parseInt(n.substring(i, i + 1));
            } {
                sum += Integer.parseInt(n.substring(i, i + 1));
            } sum += Integer.parseInt(n.substring(i, i + 1)) sum Integer.parseInt(n.substring(i, i + 1)) Integer.parseInt Integer n.substring(i, i + 1) n.substring n i i + 1 i 1 System.out.println((sum % 9 == 0) ? "Yes" : "No") System.out.println System.out System System.out (sum % 9 == 0) ? "Yes" : "No" (sum % 9 == 0) sum % 9 sum 9 0 "Yes" "No" String[] args args public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String n = sc.next();
        if ("0".equals(n)) {
            System.out.println("Yes");
        } else {
            long sum = 0;
            for (int i = 0; i < n.length(); i++) {
                sum += Integer.parseInt(n.substring(i, i + 1));
            }
            System.out.println((sum % 9 == 0) ? "Yes" : "No");
        }

    }
} public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String n = sc.next();
        if ("0".equals(n)) {
            System.out.println("Yes");
        } else {
            long sum = 0;
            for (int i = 0; i < n.length(); i++) {
                sum += Integer.parseInt(n.substring(i, i + 1));
            }
            System.out.println((sum % 9 == 0) ? "Yes" : "No");
        }

    }
} Main
import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String n = sc.next();
        if ("0".equals(n)) {
            System.out.println("Yes");
        } else {
            long sum = 0;
            for (int i = 0; i < n.length(); i++) {
                sum += Integer.parseInt(n.substring(i, i + 1));
            }
            System.out.println((sum % 9 == 0) ? "Yes" : "No");
        }

    }
}
