
import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String n = sc.next();
		int count = 0;

		for (int i = 1; i <= n.length(); i++) {
			count += Integer.parseInt(n.substring(i-1, i));
		}

		if (count % 9 == 0) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}

		sc.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