import java.util.Scanner;

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

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