import java.math.BigInteger;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        BigInteger n = sc.nextBigInteger();
        BigInteger ans = n.remainder(new BigInteger("9"));
        if(ans.equals(BigInteger.ZERO)) System.out.println("Yes");
        else System.out.println("No");
    }
} import java.math.BigInteger; BigInteger java.math import java.util.Scanner; Scanner java.util public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        BigInteger n = sc.nextBigInteger();
        BigInteger ans = n.remainder(new BigInteger("9"));
        if(ans.equals(BigInteger.ZERO)) System.out.println("Yes");
        else System.out.println("No");
    }
} Main public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        BigInteger n = sc.nextBigInteger();
        BigInteger ans = n.remainder(new BigInteger("9"));
        if(ans.equals(BigInteger.ZERO)) System.out.println("Yes");
        else System.out.println("No");
    } main {
        Scanner sc = new Scanner(System.in);
        BigInteger n = sc.nextBigInteger();
        BigInteger ans = n.remainder(new BigInteger("9"));
        if(ans.equals(BigInteger.ZERO)) System.out.println("Yes");
        else System.out.println("No");
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) BigInteger n = sc.nextBigInteger(); n sc.nextBigInteger() sc.nextBigInteger sc BigInteger ans = n.remainder(new BigInteger("9")); ans n.remainder(new BigInteger("9")) n.remainder n new BigInteger("9") if(ans.equals(BigInteger.ZERO)) System.out.println("Yes");
        else System.out.println("No"); ans.equals(BigInteger.ZERO) ans.equals ans BigInteger.ZERO BigInteger BigInteger.ZERO System.out.println("Yes") System.out.println System.out System System.out "Yes" 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);
        BigInteger n = sc.nextBigInteger();
        BigInteger ans = n.remainder(new BigInteger("9"));
        if(ans.equals(BigInteger.ZERO)) System.out.println("Yes");
        else System.out.println("No");
    }
} public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        BigInteger n = sc.nextBigInteger();
        BigInteger ans = n.remainder(new BigInteger("9"));
        if(ans.equals(BigInteger.ZERO)) System.out.println("Yes");
        else System.out.println("No");
    }
} Main
import java.math.BigInteger;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        BigInteger n = sc.nextBigInteger();
        BigInteger ans = n.remainder(new BigInteger("9"));
        if(ans.equals(BigInteger.ZERO)) System.out.println("Yes");
        else System.out.println("No");
    }
}