import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		String s = sc.next();
        int mod = 0;
        for(int i=0;i<s.length();i++){int a = (int)(s.charAt(i))-48;
                                      mod+=a;
                                      mod%=9;
                            }       
		if(mod==0){System.out.println("Yes");}
      else{System.out.println("No");}
	}
} import java.util.*; util.* java public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		String s = sc.next();
        int mod = 0;
        for(int i=0;i<s.length();i++){int a = (int)(s.charAt(i))-48;
                                      mod+=a;
                                      mod%=9;
                            }       
		if(mod==0){System.out.println("Yes");}
      else{System.out.println("No");}
	}
} Main public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		String s = sc.next();
        int mod = 0;
        for(int i=0;i<s.length();i++){int a = (int)(s.charAt(i))-48;
                                      mod+=a;
                                      mod%=9;
                            }       
		if(mod==0){System.out.println("Yes");}
      else{System.out.println("No");}
	} main {
		Scanner sc = new Scanner(System.in);
		String s = sc.next();
        int mod = 0;
        for(int i=0;i<s.length();i++){int a = (int)(s.charAt(i))-48;
                                      mod+=a;
                                      mod%=9;
                            }       
		if(mod==0){System.out.println("Yes");}
      else{System.out.println("No");}
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String s = sc.next(); s sc.next() sc.next sc int mod = 0; mod 0 for(int i=0;i<s.length();i++){int a = (int)(s.charAt(i))-48;
                                      mod+=a;
                                      mod%=9;
                            } int i=0; int i=0; i 0 i<s.length() i s.length() s.length s i++ i++ i {int a = (int)(s.charAt(i))-48;
                                      mod+=a;
                                      mod%=9;
                            } {int a = (int)(s.charAt(i))-48;
                                      mod+=a;
                                      mod%=9;
                            } int a = (int)(s.charAt(i))-48; a (int)(s.charAt(i))-48 (int)(s.charAt(i)) s.charAt s i 48 mod+=a mod a mod%=9 mod 9 if(mod==0){System.out.println("Yes");}
      else{System.out.println("No");} mod==0 mod 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 s = sc.next();
        int mod = 0;
        for(int i=0;i<s.length();i++){int a = (int)(s.charAt(i))-48;
                                      mod+=a;
                                      mod%=9;
                            }       
		if(mod==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 s = sc.next();
        int mod = 0;
        for(int i=0;i<s.length();i++){int a = (int)(s.charAt(i))-48;
                                      mod+=a;
                                      mod%=9;
                            }       
		if(mod==0){System.out.println("Yes");}
      else{System.out.println("No");}
	}
} Main
import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		String s = sc.next();
        int mod = 0;
        for(int i=0;i<s.length();i++){int a = (int)(s.charAt(i))-48;
                                      mod+=a;
                                      mod%=9;
                            }       
		if(mod==0){System.out.println("Yes");}
      else{System.out.println("No");}
	}
}