import java.util.Scanner;

public class Main {
	public static void main(String[] args){
		Scanner stdIn = new Scanner(System.in);
		String N = stdIn.next();
		if(N.length() < 8){
			long A = new Long(N);
			if(A % 9 == 0){
				System.out.println("Yes");
			}
			else{
				System.out.println("No");
			}
		}
		else{
			int sum = 0;
			int a = 0;
			for(int i = 0; i < N.length(); i++){
				a = N.charAt(i);
				a = a - 48;
				sum = sum + a;
			}
			if(sum % 9 == 0){
				System.out.println("Yes");
			}
			else{
				System.out.println("No");
			}


		}
		stdIn.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