import java.util.*;
public class Main {
	public static void main(String[] args){
      Scanner sc = new Scanner(System.in);
      String N = sc.next();
      long sum = 0;
      for(int i=0;i<N.length();i++){
        String s = N.substring(i,i+1);
        int n = Integer.parseInt(s);
        sum+=n;
        sum%=9;
      }
      if(sum==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 N = sc.next();
      long sum = 0;
      for(int i=0;i<N.length();i++){
        String s = N.substring(i,i+1);
        int n = Integer.parseInt(s);
        sum+=n;
        sum%=9;
      }
      if(sum==0){
        System.out.println("Yes");
      }else{
        System.out.println("No");
      }
    }
} Main public static void main(String[] args){
      Scanner sc = new Scanner(System.in);
      String N = sc.next();
      long sum = 0;
      for(int i=0;i<N.length();i++){
        String s = N.substring(i,i+1);
        int n = Integer.parseInt(s);
        sum+=n;
        sum%=9;
      }
      if(sum==0){
        System.out.println("Yes");
      }else{
        System.out.println("No");
      }
    } main {
      Scanner sc = new Scanner(System.in);
      String N = sc.next();
      long sum = 0;
      for(int i=0;i<N.length();i++){
        String s = N.substring(i,i+1);
        int n = Integer.parseInt(s);
        sum+=n;
        sum%=9;
      }
      if(sum==0){
        System.out.println("Yes");
      }else{
        System.out.println("No");
      }
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String N = sc.next(); N sc.next() sc.next sc long sum = 0; sum 0 for(int i=0;i<N.length();i++){
        String s = N.substring(i,i+1);
        int n = Integer.parseInt(s);
        sum+=n;
        sum%=9;
      } int i=0; int i=0; i 0 i<N.length() i N.length() N.length N i++ i++ i {
        String s = N.substring(i,i+1);
        int n = Integer.parseInt(s);
        sum+=n;
        sum%=9;
      } {
        String s = N.substring(i,i+1);
        int n = Integer.parseInt(s);
        sum+=n;
        sum%=9;
      } String s = N.substring(i,i+1); s N.substring(i,i+1) N.substring N i i+1 i 1 int n = Integer.parseInt(s); n Integer.parseInt(s) Integer.parseInt Integer s sum+=n sum n sum%=9 sum 9 if(sum==0){
        System.out.println("Yes");
      }else{
        System.out.println("No");
      } sum==0 sum 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 N = sc.next();
      long sum = 0;
      for(int i=0;i<N.length();i++){
        String s = N.substring(i,i+1);
        int n = Integer.parseInt(s);
        sum+=n;
        sum%=9;
      }
      if(sum==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 N = sc.next();
      long sum = 0;
      for(int i=0;i<N.length();i++){
        String s = N.substring(i,i+1);
        int n = Integer.parseInt(s);
        sum+=n;
        sum%=9;
      }
      if(sum==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 N = sc.next();
      long sum = 0;
      for(int i=0;i<N.length();i++){
        String s = N.substring(i,i+1);
        int n = Integer.parseInt(s);
        sum+=n;
        sum%=9;
      }
      if(sum==0){
        System.out.println("Yes");
      }else{
        System.out.println("No");
      }
    }
}