import java.util.Scanner;
public class Main {
  public static void main(String[] args){
    Scanner scan = new Scanner(System.in);
    String n = scan.nextLine();
    int len = n.length();
    int sum=0;
    char[] arr = new char[len];
    
    for(int i=0;i<len;i++){
      arr[i] = (n.charAt(i));
    }
    for(int i=0;i<len;i++){
      sum = sum + Character.getNumericValue(arr[i]);
    }
    if(sum%9 == 0 || n.equals("0")){
      System.out.println("Yes");
    }else{
      System.out.println("No");
    }
  }
  
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz