import java.util.*;
public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    String str = sc.next();
    int sum = 0;
    for(int i = 0; i < str.length(); i++){
      //System.out.println(str.charAt(i));
      sum += Character.getNumericValue(str.charAt(i));
      //System.out.println(sum);
    }
      //System.out.println(sum);
    
    if (sum==0 || 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 str = sc.next();
    int sum = 0;
    for(int i = 0; i < str.length(); i++){
      //System.out.println(str.charAt(i));
      sum += Character.getNumericValue(str.charAt(i));
      //System.out.println(sum);
    }
      //System.out.println(sum);
    
    if (sum==0 || 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 str = sc.next();
    int sum = 0;
    for(int i = 0; i < str.length(); i++){
      //System.out.println(str.charAt(i));
      sum += Character.getNumericValue(str.charAt(i));
      //System.out.println(sum);
    }
      //System.out.println(sum);
    
    if (sum==0 || sum%9==0){
      System.out.println("Yes");
    }else{
      System.out.println("No");
    }
  } main {
    Scanner sc = new Scanner(System.in);
    String str = sc.next();
    int sum = 0;
    for(int i = 0; i < str.length(); i++){
      //System.out.println(str.charAt(i));
      sum += Character.getNumericValue(str.charAt(i));
      //System.out.println(sum);
    }
      //System.out.println(sum);
    
    if (sum==0 || sum%9==0){
      System.out.println("Yes");
    }else{
      System.out.println("No");
    }
  } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String str = sc.next(); str sc.next() sc.next sc int sum = 0; sum 0 for(int i = 0; i < str.length(); i++){
      //System.out.println(str.charAt(i));
      sum += Character.getNumericValue(str.charAt(i));
      //System.out.println(sum);
    } int i = 0; int i = 0; i 0 i < str.length() i str.length() str.length str i++ i++ i {
      //System.out.println(str.charAt(i));
      sum += Character.getNumericValue(str.charAt(i));
      //System.out.println(sum);
    } {
      //System.out.println(str.charAt(i));
      sum += Character.getNumericValue(str.charAt(i));
      //System.out.println(sum);
    } sum += Character.getNumericValue(str.charAt(i)) sum Character.getNumericValue(str.charAt(i)) Character.getNumericValue Character str.charAt(i) str.charAt str i if (sum==0 || sum%9==0){
      System.out.println("Yes");
    }else{
      System.out.println("No");
    } sum==0 || sum%9==0 sum==0 sum 0 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 str = sc.next();
    int sum = 0;
    for(int i = 0; i < str.length(); i++){
      //System.out.println(str.charAt(i));
      sum += Character.getNumericValue(str.charAt(i));
      //System.out.println(sum);
    }
      //System.out.println(sum);
    
    if (sum==0 || 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 str = sc.next();
    int sum = 0;
    for(int i = 0; i < str.length(); i++){
      //System.out.println(str.charAt(i));
      sum += Character.getNumericValue(str.charAt(i));
      //System.out.println(sum);
    }
      //System.out.println(sum);
    
    if (sum==0 || 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 str = sc.next();
    int sum = 0;
    for(int i = 0; i < str.length(); i++){
      //System.out.println(str.charAt(i));
      sum += Character.getNumericValue(str.charAt(i));
      //System.out.println(sum);
    }
      //System.out.println(sum);
    
    if (sum==0 || sum%9==0){
      System.out.println("Yes");
    }else{
      System.out.println("No");
    }
  }
}