import java.util.Scanner;
public class Main{
    public static void main(String[] args) {
        Scanner in=new Scanner(System.in);
        String s=in.nextLine();
        long sum=0;
        char ch[]=s.toCharArray();
        for (int i = 0; i <s.length(); i++) {
            sum+=(int)ch[i]-48;
        }
        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 in=new Scanner(System.in);
        String s=in.nextLine();
        long sum=0;
        char ch[]=s.toCharArray();
        for (int i = 0; i <s.length(); i++) {
            sum+=(int)ch[i]-48;
        }
        if(sum%9==0){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
}
} Main public static void main(String[] args) {
        Scanner in=new Scanner(System.in);
        String s=in.nextLine();
        long sum=0;
        char ch[]=s.toCharArray();
        for (int i = 0; i <s.length(); i++) {
            sum+=(int)ch[i]-48;
        }
        if(sum%9==0){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
} main {
        Scanner in=new Scanner(System.in);
        String s=in.nextLine();
        long sum=0;
        char ch[]=s.toCharArray();
        for (int i = 0; i <s.length(); i++) {
            sum+=(int)ch[i]-48;
        }
        if(sum%9==0){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
} Scanner in=new Scanner(System.in); in new Scanner(System.in) String s=in.nextLine(); s in.nextLine() in.nextLine in long sum=0; sum 0 char ch[]=s.toCharArray(); ch s.toCharArray() s.toCharArray s for (int i = 0; i <s.length(); i++) {
            sum+=(int)ch[i]-48;
        } int i = 0; int i = 0; i 0 i <s.length() i s.length() s.length s i++ i++ i {
            sum+=(int)ch[i]-48;
        } {
            sum+=(int)ch[i]-48;
        } sum+=(int)ch[i]-48 sum (int)ch[i]-48 (int)ch[i] ch i 48 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 in=new Scanner(System.in);
        String s=in.nextLine();
        long sum=0;
        char ch[]=s.toCharArray();
        for (int i = 0; i <s.length(); i++) {
            sum+=(int)ch[i]-48;
        }
        if(sum%9==0){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
}
} public class Main{
    public static void main(String[] args) {
        Scanner in=new Scanner(System.in);
        String s=in.nextLine();
        long sum=0;
        char ch[]=s.toCharArray();
        for (int i = 0; i <s.length(); i++) {
            sum+=(int)ch[i]-48;
        }
        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 in=new Scanner(System.in);
        String s=in.nextLine();
        long sum=0;
        char ch[]=s.toCharArray();
        for (int i = 0; i <s.length(); i++) {
            sum+=(int)ch[i]-48;
        }
        if(sum%9==0){
            System.out.println("Yes");
        }else{
            System.out.println("No");
        }
}
}