import java.util.Scanner;

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