import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
      Scanner scan = new Scanner(System.in);
      String num = scan.nextLine();
      String[] strs = num.split("");
      int[] nums = new int[strs.length];
      int sum = 0;
      
      for (int i = 0; i < strs.length; i++) {
        nums[i] = Integer.parseInt(strs[i]);
        sum += nums[i];
      }
      
      if (sum % 9 == 0) {
        System.out.println("Yes");
      } else {
        System.out.println("No");
      }

      
      scan.close();
    }
}
/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