import java.util.*;

public class Main{
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String num = sc.nextLine();
        if(num == "0") {
            System.out.println("No");
        }
        else {
            long sum = 0;
            for(int i = 0; i < num.length(); i++) {
                char ch = num.charAt(i);
                sum += Integer.parseInt(String.valueOf(ch));
            }
            if (sum % 9 == 0) {
                System.out.println("Yes");
            } else {
                System.out.println("No");
            }
        }
    }
} import java.util.*; util.* java public class Main{
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String num = sc.nextLine();
        if(num == "0") {
            System.out.println("No");
        }
        else {
            long sum = 0;
            for(int i = 0; i < num.length(); i++) {
                char ch = num.charAt(i);
                sum += Integer.parseInt(String.valueOf(ch));
            }
            if (sum % 9 == 0) {
                System.out.println("Yes");
            } else {
                System.out.println("No");
            }
        }
    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String num = sc.nextLine();
        if(num == "0") {
            System.out.println("No");
        }
        else {
            long sum = 0;
            for(int i = 0; i < num.length(); i++) {
                char ch = num.charAt(i);
                sum += Integer.parseInt(String.valueOf(ch));
            }
            if (sum % 9 == 0) {
                System.out.println("Yes");
            } else {
                System.out.println("No");
            }
        }
    } main {
        Scanner sc = new Scanner(System.in);
        String num = sc.nextLine();
        if(num == "0") {
            System.out.println("No");
        }
        else {
            long sum = 0;
            for(int i = 0; i < num.length(); i++) {
                char ch = num.charAt(i);
                sum += Integer.parseInt(String.valueOf(ch));
            }
            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 num = sc.nextLine(); num sc.nextLine() sc.nextLine sc if(num == "0") {
            System.out.println("No");
        }
        else {
            long sum = 0;
            for(int i = 0; i < num.length(); i++) {
                char ch = num.charAt(i);
                sum += Integer.parseInt(String.valueOf(ch));
            }
            if (sum % 9 == 0) {
                System.out.println("Yes");
            } else {
                System.out.println("No");
            }
        } num == "0" num "0" {
            System.out.println("No");
        } System.out.println("No") System.out.println System.out System System.out "No" {
            long sum = 0;
            for(int i = 0; i < num.length(); i++) {
                char ch = num.charAt(i);
                sum += Integer.parseInt(String.valueOf(ch));
            }
            if (sum % 9 == 0) {
                System.out.println("Yes");
            } else {
                System.out.println("No");
            }
        } long sum = 0; sum 0 for(int i = 0; i < num.length(); i++) {
                char ch = num.charAt(i);
                sum += Integer.parseInt(String.valueOf(ch));
            } int i = 0; int i = 0; i 0 i < num.length() i num.length() num.length num i++ i++ i {
                char ch = num.charAt(i);
                sum += Integer.parseInt(String.valueOf(ch));
            } {
                char ch = num.charAt(i);
                sum += Integer.parseInt(String.valueOf(ch));
            } char ch = num.charAt(i); ch num.charAt(i) num.charAt num i sum += Integer.parseInt(String.valueOf(ch)) sum Integer.parseInt(String.valueOf(ch)) Integer.parseInt Integer String.valueOf(ch) String.valueOf String ch 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 sc = new Scanner(System.in);
        String num = sc.nextLine();
        if(num == "0") {
            System.out.println("No");
        }
        else {
            long sum = 0;
            for(int i = 0; i < num.length(); i++) {
                char ch = num.charAt(i);
                sum += Integer.parseInt(String.valueOf(ch));
            }
            if (sum % 9 == 0) {
                System.out.println("Yes");
            } else {
                System.out.println("No");
            }
        }
    }
} public class Main{
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String num = sc.nextLine();
        if(num == "0") {
            System.out.println("No");
        }
        else {
            long sum = 0;
            for(int i = 0; i < num.length(); i++) {
                char ch = num.charAt(i);
                sum += Integer.parseInt(String.valueOf(ch));
            }
            if (sum % 9 == 0) {
                System.out.println("Yes");
            } else {
                System.out.println("No");
            }
        }
    }
} Main
import java.util.*;

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