import java.io.*;
import java.util.*;

public class Main {


    public static void main(String[] args) throws Exception {

        FastReader fs = new FastReader();
        out = new PrintWriter(new BufferedOutputStream(System.out));

       String s = fs.next();

       long ans = 0 ;
       long mod = 9 ;

       for(int i=0; i<s.length() ; i++ ){
           long dig = s.charAt(i) - 48 ;
           ans = (ans%mod + dig%mod)%mod;
       }

       if(ans == 0){
           out.println("Yes");
       }else{
           out.println("No");
       }

        out.close();

    }

    //-----------PrintWriter for faster output---------------------------------
    public static PrintWriter out;

    //-----------MyScanner class for faster input----------
    public static class FastReader {
        BufferedReader br;
        StringTokenizer st;

        public FastReader() {
            br = new BufferedReader(new InputStreamReader(System.in));
        }

        String next() {
            while (st == null || !st.hasMoreElements()) {
                try {
                    st = new StringTokenizer(br.readLine());
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            return st.nextToken();
        }

        int nextInt() {
            return Integer.parseInt(next());
        }

        long nextLong() {
            return Long.parseLong(next());
        }

        double nextDouble() {
            return Double.parseDouble(next());
        }

        String nextLine() {
            String str = "";
            try {
                str = br.readLine();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return str;
        }

    }
    //--------------------------------------------------------
}
 import java.io.*; io.* java import java.util.*; util.* java public class Main {


    public static void main(String[] args) throws Exception {

        FastReader fs = new FastReader();
        out = new PrintWriter(new BufferedOutputStream(System.out));

       String s = fs.next();

       long ans = 0 ;
       long mod = 9 ;

       for(int i=0; i<s.length() ; i++ ){
           long dig = s.charAt(i) - 48 ;
           ans = (ans%mod + dig%mod)%mod;
       }

       if(ans == 0){
           out.println("Yes");
       }else{
           out.println("No");
       }

        out.close();

    }

    //-----------PrintWriter for faster output---------------------------------
    public static PrintWriter out;

    //-----------MyScanner class for faster input----------
    public static class FastReader {
        BufferedReader br;
        StringTokenizer st;

        public FastReader() {
            br = new BufferedReader(new InputStreamReader(System.in));
        }

        String next() {
            while (st == null || !st.hasMoreElements()) {
                try {
                    st = new StringTokenizer(br.readLine());
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            return st.nextToken();
        }

        int nextInt() {
            return Integer.parseInt(next());
        }

        long nextLong() {
            return Long.parseLong(next());
        }

        double nextDouble() {
            return Double.parseDouble(next());
        }

        String nextLine() {
            String str = "";
            try {
                str = br.readLine();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return str;
        }

    }
    //--------------------------------------------------------
} Main //-----------PrintWriter for faster output---------------------------------
    public static PrintWriter out; out public static void main(String[] args) throws Exception {

        FastReader fs = new FastReader();
        out = new PrintWriter(new BufferedOutputStream(System.out));

       String s = fs.next();

       long ans = 0 ;
       long mod = 9 ;

       for(int i=0; i<s.length() ; i++ ){
           long dig = s.charAt(i) - 48 ;
           ans = (ans%mod + dig%mod)%mod;
       }

       if(ans == 0){
           out.println("Yes");
       }else{
           out.println("No");
       }

        out.close();

    } main {

        FastReader fs = new FastReader();
        out = new PrintWriter(new BufferedOutputStream(System.out));

       String s = fs.next();

       long ans = 0 ;
       long mod = 9 ;

       for(int i=0; i<s.length() ; i++ ){
           long dig = s.charAt(i) - 48 ;
           ans = (ans%mod + dig%mod)%mod;
       }

       if(ans == 0){
           out.println("Yes");
       }else{
           out.println("No");
       }

        out.close();

    } FastReader fs = new FastReader(); fs new FastReader() out = new PrintWriter(new BufferedOutputStream(System.out)) out new PrintWriter(new BufferedOutputStream(System.out)) String s = fs.next(); s fs.next() fs.next fs long ans = 0 ; ans 0 long mod = 9 ; mod 9 for(int i=0; i<s.length() ; i++ ){
           long dig = s.charAt(i) - 48 ;
           ans = (ans%mod + dig%mod)%mod;
       } int i=0; int i=0; i 0 i<s.length() i s.length() s.length s i++ i++ i {
           long dig = s.charAt(i) - 48 ;
           ans = (ans%mod + dig%mod)%mod;
       } {
           long dig = s.charAt(i) - 48 ;
           ans = (ans%mod + dig%mod)%mod;
       } long dig = s.charAt(i) - 48 ; dig s.charAt(i) - 48 s.charAt(i) s.charAt s i 48 ans = (ans%mod + dig%mod)%mod ans (ans%mod + dig%mod)%mod (ans%mod + dig%mod) ans%mod ans mod dig%mod dig mod mod if(ans == 0){
           out.println("Yes");
       }else{
           out.println("No");
       } ans == 0 ans 0 {
           out.println("Yes");
       } out.println("Yes") out.println out "Yes" {
           out.println("No");
       } out.println("No") out.println out "No" out.close() out.close out String[] args args public static class FastReader {
        BufferedReader br;
        StringTokenizer st;

        public FastReader() {
            br = new BufferedReader(new InputStreamReader(System.in));
        }

        String next() {
            while (st == null || !st.hasMoreElements()) {
                try {
                    st = new StringTokenizer(br.readLine());
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            return st.nextToken();
        }

        int nextInt() {
            return Integer.parseInt(next());
        }

        long nextLong() {
            return Long.parseLong(next());
        }

        double nextDouble() {
            return Double.parseDouble(next());
        }

        String nextLine() {
            String str = "";
            try {
                str = br.readLine();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return str;
        }

    } FastReader BufferedReader br; br StringTokenizer st; st public FastReader() {
            br = new BufferedReader(new InputStreamReader(System.in));
        } FastReader {
            br = new BufferedReader(new InputStreamReader(System.in));
        } br = new BufferedReader(new InputStreamReader(System.in)) br new BufferedReader(new InputStreamReader(System.in)) String next() {
            while (st == null || !st.hasMoreElements()) {
                try {
                    st = new StringTokenizer(br.readLine());
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            return st.nextToken();
        } next {
            while (st == null || !st.hasMoreElements()) {
                try {
                    st = new StringTokenizer(br.readLine());
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            return st.nextToken();
        } while (st == null || !st.hasMoreElements()) {
                try {
                    st = new StringTokenizer(br.readLine());
                } catch (IOException e) {
                    e.printStackTrace();
                }
            } st == null || !st.hasMoreElements() st == null st null !st.hasMoreElements() st.hasMoreElements() st.hasMoreElements st {
                try {
                    st = new StringTokenizer(br.readLine());
                } catch (IOException e) {
                    e.printStackTrace();
                }
            } try {
                    st = new StringTokenizer(br.readLine());
                } catch (IOException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                } IOException e {
                    e.printStackTrace();
                } e.printStackTrace() e.printStackTrace e {
                    st = new StringTokenizer(br.readLine());
                } st = new StringTokenizer(br.readLine()) st new StringTokenizer(br.readLine()) return st.nextToken(); st.nextToken() st.nextToken st int nextInt() {
            return Integer.parseInt(next());
        } nextInt {
            return Integer.parseInt(next());
        } return Integer.parseInt(next()); Integer.parseInt(next()) Integer.parseInt Integer next() next long nextLong() {
            return Long.parseLong(next());
        } nextLong {
            return Long.parseLong(next());
        } return Long.parseLong(next()); Long.parseLong(next()) Long.parseLong Long next() next double nextDouble() {
            return Double.parseDouble(next());
        } nextDouble {
            return Double.parseDouble(next());
        } return Double.parseDouble(next()); Double.parseDouble(next()) Double.parseDouble Double next() next String nextLine() {
            String str = "";
            try {
                str = br.readLine();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return str;
        } nextLine {
            String str = "";
            try {
                str = br.readLine();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return str;
        } String str = ""; str "" try {
                str = br.readLine();
            } catch (IOException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            } IOException e {
                e.printStackTrace();
            } e.printStackTrace() e.printStackTrace e {
                str = br.readLine();
            } str = br.readLine() str br.readLine() br.readLine br return str; str public class Main {


    public static void main(String[] args) throws Exception {

        FastReader fs = new FastReader();
        out = new PrintWriter(new BufferedOutputStream(System.out));

       String s = fs.next();

       long ans = 0 ;
       long mod = 9 ;

       for(int i=0; i<s.length() ; i++ ){
           long dig = s.charAt(i) - 48 ;
           ans = (ans%mod + dig%mod)%mod;
       }

       if(ans == 0){
           out.println("Yes");
       }else{
           out.println("No");
       }

        out.close();

    }

    //-----------PrintWriter for faster output---------------------------------
    public static PrintWriter out;

    //-----------MyScanner class for faster input----------
    public static class FastReader {
        BufferedReader br;
        StringTokenizer st;

        public FastReader() {
            br = new BufferedReader(new InputStreamReader(System.in));
        }

        String next() {
            while (st == null || !st.hasMoreElements()) {
                try {
                    st = new StringTokenizer(br.readLine());
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            return st.nextToken();
        }

        int nextInt() {
            return Integer.parseInt(next());
        }

        long nextLong() {
            return Long.parseLong(next());
        }

        double nextDouble() {
            return Double.parseDouble(next());
        }

        String nextLine() {
            String str = "";
            try {
                str = br.readLine();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return str;
        }

    }
    //--------------------------------------------------------
} public class Main {


    public static void main(String[] args) throws Exception {

        FastReader fs = new FastReader();
        out = new PrintWriter(new BufferedOutputStream(System.out));

       String s = fs.next();

       long ans = 0 ;
       long mod = 9 ;

       for(int i=0; i<s.length() ; i++ ){
           long dig = s.charAt(i) - 48 ;
           ans = (ans%mod + dig%mod)%mod;
       }

       if(ans == 0){
           out.println("Yes");
       }else{
           out.println("No");
       }

        out.close();

    }

    //-----------PrintWriter for faster output---------------------------------
    public static PrintWriter out;

    //-----------MyScanner class for faster input----------
    public static class FastReader {
        BufferedReader br;
        StringTokenizer st;

        public FastReader() {
            br = new BufferedReader(new InputStreamReader(System.in));
        }

        String next() {
            while (st == null || !st.hasMoreElements()) {
                try {
                    st = new StringTokenizer(br.readLine());
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            return st.nextToken();
        }

        int nextInt() {
            return Integer.parseInt(next());
        }

        long nextLong() {
            return Long.parseLong(next());
        }

        double nextDouble() {
            return Double.parseDouble(next());
        }

        String nextLine() {
            String str = "";
            try {
                str = br.readLine();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return str;
        }

    }
    //--------------------------------------------------------
} Main
import java.io.*;
import java.util.*;

public class Main {


    public static void main(String[] args) throws Exception {

        FastReader fs = new FastReader();
        out = new PrintWriter(new BufferedOutputStream(System.out));

       String s = fs.next();

       long ans = 0 ;
       long mod = 9 ;

       for(int i=0; i<s.length() ; i++ ){
           long dig = s.charAt(i) - 48 ;
           ans = (ans%mod + dig%mod)%mod;
       }

       if(ans == 0){
           out.println("Yes");
       }else{
           out.println("No");
       }

        out.close();

    }

    //-----------PrintWriter for faster output---------------------------------
    public static PrintWriter out;

    //-----------MyScanner class for faster input----------
    public static class FastReader {
        BufferedReader br;
        StringTokenizer st;

        public FastReader() {
            br = new BufferedReader(new InputStreamReader(System.in));
        }

        String next() {
            while (st == null || !st.hasMoreElements()) {
                try {
                    st = new StringTokenizer(br.readLine());
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            return st.nextToken();
        }

        int nextInt() {
            return Integer.parseInt(next());
        }

        long nextLong() {
            return Long.parseLong(next());
        }

        double nextDouble() {
            return Double.parseDouble(next());
        }

        String nextLine() {
            String str = "";
            try {
                str = br.readLine();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return str;
        }

    }
    //--------------------------------------------------------
}

