import java.util.Scanner;

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