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");
    }
  }
}
/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