import java.util.Scanner;

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

    }
} import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String s = scanner.nextLine();
        long sum = 0;
        for (int i = 0; i < s.length(); i++) {
            sum += s.charAt(i) - '0';
        }
        if (sum % 9 == 0) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }

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

    } main {
        Scanner scanner = new Scanner(System.in);
        String s = scanner.nextLine();
        long sum = 0;
        for (int i = 0; i < s.length(); i++) {
            sum += s.charAt(i) - '0';
        }
        if (sum % 9 == 0) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }

    } Scanner scanner = new Scanner(System.in); scanner new Scanner(System.in) String s = scanner.nextLine(); s scanner.nextLine() scanner.nextLine scanner long sum = 0; sum 0 for (int i = 0; i < s.length(); i++) {
            sum += s.charAt(i) - '0';
        } int i = 0; int i = 0; i 0 i < s.length() i s.length() s.length s i++ i++ i {
            sum += s.charAt(i) - '0';
        } {
            sum += s.charAt(i) - '0';
        } sum += s.charAt(i) - '0' sum s.charAt(i) - '0' s.charAt(i) s.charAt s 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("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 scanner = new Scanner(System.in);
        String s = scanner.nextLine();
        long sum = 0;
        for (int i = 0; i < s.length(); i++) {
            sum += s.charAt(i) - '0';
        }
        if (sum % 9 == 0) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }

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

    }
} Main
import java.util.Scanner;

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

    }
}