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");
      }
    }
}
/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