import java.util.*;
import java.io.*;
import java.math.BigInteger;

public class Main {
    public static void main(String[] args) {
        MyScanner scn = new MyScanner();
        out = new PrintWriter(new BufferedOutputStream(System.out));

        // Start writing your solution here. -------------------------------------

        /*
         * int n = sc.nextInt(); // read input as integer long k = sc.nextLong(); //
         * read input as long double d = sc.nextDouble(); // read input as double String
         * str = sc.next(); // read input as String String s = sc.nextLine(); // read
         * whole line as String
         * 
         * int result = 3*n; out.println(result); // print via PrintWriter
         */

        // Stop writing your solution here. -------------------------------------
        String s = scn.next();
        // BigInteger input = new BigInteger(s);
        BigInteger ans = new BigInteger("0");

        for (int i = 0; i < s.length(); i++) {
            int val = s.charAt(i) - '0';
            ans = ans.add(BigInteger.valueOf(val));
        }
        out.println(ans.mod(BigInteger.valueOf(9)) == BigInteger.valueOf(0) ? "Yes" : "No");

        out.close();
    }

    public static PrintWriter out;

    public static class MyScanner {
        BufferedReader br;
        StringTokenizer st;

        public MyScanner() {
            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.util.*; util.* java import java.io.*; io.* java import java.math.BigInteger; BigInteger java.math public class Main {
    public static void main(String[] args) {
        MyScanner scn = new MyScanner();
        out = new PrintWriter(new BufferedOutputStream(System.out));

        // Start writing your solution here. -------------------------------------

        /*
         * int n = sc.nextInt(); // read input as integer long k = sc.nextLong(); //
         * read input as long double d = sc.nextDouble(); // read input as double String
         * str = sc.next(); // read input as String String s = sc.nextLine(); // read
         * whole line as String
         * 
         * int result = 3*n; out.println(result); // print via PrintWriter
         */

        // Stop writing your solution here. -------------------------------------
        String s = scn.next();
        // BigInteger input = new BigInteger(s);
        BigInteger ans = new BigInteger("0");

        for (int i = 0; i < s.length(); i++) {
            int val = s.charAt(i) - '0';
            ans = ans.add(BigInteger.valueOf(val));
        }
        out.println(ans.mod(BigInteger.valueOf(9)) == BigInteger.valueOf(0) ? "Yes" : "No");

        out.close();
    }

    public static PrintWriter out;

    public static class MyScanner {
        BufferedReader br;
        StringTokenizer st;

        public MyScanner() {
            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 public static PrintWriter out; out public static void main(String[] args) {
        MyScanner scn = new MyScanner();
        out = new PrintWriter(new BufferedOutputStream(System.out));

        // Start writing your solution here. -------------------------------------

        /*
         * int n = sc.nextInt(); // read input as integer long k = sc.nextLong(); //
         * read input as long double d = sc.nextDouble(); // read input as double String
         * str = sc.next(); // read input as String String s = sc.nextLine(); // read
         * whole line as String
         * 
         * int result = 3*n; out.println(result); // print via PrintWriter
         */

        // Stop writing your solution here. -------------------------------------
        String s = scn.next();
        // BigInteger input = new BigInteger(s);
        BigInteger ans = new BigInteger("0");

        for (int i = 0; i < s.length(); i++) {
            int val = s.charAt(i) - '0';
            ans = ans.add(BigInteger.valueOf(val));
        }
        out.println(ans.mod(BigInteger.valueOf(9)) == BigInteger.valueOf(0) ? "Yes" : "No");

        out.close();
    } main {
        MyScanner scn = new MyScanner();
        out = new PrintWriter(new BufferedOutputStream(System.out));

        // Start writing your solution here. -------------------------------------

        /*
         * int n = sc.nextInt(); // read input as integer long k = sc.nextLong(); //
         * read input as long double d = sc.nextDouble(); // read input as double String
         * str = sc.next(); // read input as String String s = sc.nextLine(); // read
         * whole line as String
         * 
         * int result = 3*n; out.println(result); // print via PrintWriter
         */

        // Stop writing your solution here. -------------------------------------
        String s = scn.next();
        // BigInteger input = new BigInteger(s);
        BigInteger ans = new BigInteger("0");

        for (int i = 0; i < s.length(); i++) {
            int val = s.charAt(i) - '0';
            ans = ans.add(BigInteger.valueOf(val));
        }
        out.println(ans.mod(BigInteger.valueOf(9)) == BigInteger.valueOf(0) ? "Yes" : "No");

        out.close();
    } MyScanner scn = new MyScanner(); scn new MyScanner() out = new PrintWriter(new BufferedOutputStream(System.out)) out new PrintWriter(new BufferedOutputStream(System.out)) String s = scn.next(); s scn.next() scn.next scn BigInteger ans = new BigInteger("0"); ans new BigInteger("0") for (int i = 0; i < s.length(); i++) {
            int val = s.charAt(i) - '0';
            ans = ans.add(BigInteger.valueOf(val));
        } int i = 0; int i = 0; i 0 i < s.length() i s.length() s.length s i++ i++ i {
            int val = s.charAt(i) - '0';
            ans = ans.add(BigInteger.valueOf(val));
        } {
            int val = s.charAt(i) - '0';
            ans = ans.add(BigInteger.valueOf(val));
        } int val = s.charAt(i) - '0'; val s.charAt(i) - '0' s.charAt(i) s.charAt s i '0' ans = ans.add(BigInteger.valueOf(val)) ans ans.add(BigInteger.valueOf(val)) ans.add ans BigInteger.valueOf(val) BigInteger.valueOf BigInteger val out.println(ans.mod(BigInteger.valueOf(9)) == BigInteger.valueOf(0) ? "Yes" : "No") out.println out ans.mod(BigInteger.valueOf(9)) == BigInteger.valueOf(0) ? "Yes" : "No" ans.mod(BigInteger.valueOf(9)) == BigInteger.valueOf(0) ans.mod(BigInteger.valueOf(9)) ans.mod ans BigInteger.valueOf(9) BigInteger.valueOf BigInteger 9 BigInteger.valueOf(0) BigInteger.valueOf BigInteger 0 "Yes" "No" out.close() out.close out String[] args args public static class MyScanner {
        BufferedReader br;
        StringTokenizer st;

        public MyScanner() {
            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;
        }

    } MyScanner BufferedReader br; br StringTokenizer st; st public MyScanner() {
            br = new BufferedReader(new InputStreamReader(System.in));
        } MyScanner {
            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) {
        MyScanner scn = new MyScanner();
        out = new PrintWriter(new BufferedOutputStream(System.out));

        // Start writing your solution here. -------------------------------------

        /*
         * int n = sc.nextInt(); // read input as integer long k = sc.nextLong(); //
         * read input as long double d = sc.nextDouble(); // read input as double String
         * str = sc.next(); // read input as String String s = sc.nextLine(); // read
         * whole line as String
         * 
         * int result = 3*n; out.println(result); // print via PrintWriter
         */

        // Stop writing your solution here. -------------------------------------
        String s = scn.next();
        // BigInteger input = new BigInteger(s);
        BigInteger ans = new BigInteger("0");

        for (int i = 0; i < s.length(); i++) {
            int val = s.charAt(i) - '0';
            ans = ans.add(BigInteger.valueOf(val));
        }
        out.println(ans.mod(BigInteger.valueOf(9)) == BigInteger.valueOf(0) ? "Yes" : "No");

        out.close();
    }

    public static PrintWriter out;

    public static class MyScanner {
        BufferedReader br;
        StringTokenizer st;

        public MyScanner() {
            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) {
        MyScanner scn = new MyScanner();
        out = new PrintWriter(new BufferedOutputStream(System.out));

        // Start writing your solution here. -------------------------------------

        /*
         * int n = sc.nextInt(); // read input as integer long k = sc.nextLong(); //
         * read input as long double d = sc.nextDouble(); // read input as double String
         * str = sc.next(); // read input as String String s = sc.nextLine(); // read
         * whole line as String
         * 
         * int result = 3*n; out.println(result); // print via PrintWriter
         */

        // Stop writing your solution here. -------------------------------------
        String s = scn.next();
        // BigInteger input = new BigInteger(s);
        BigInteger ans = new BigInteger("0");

        for (int i = 0; i < s.length(); i++) {
            int val = s.charAt(i) - '0';
            ans = ans.add(BigInteger.valueOf(val));
        }
        out.println(ans.mod(BigInteger.valueOf(9)) == BigInteger.valueOf(0) ? "Yes" : "No");

        out.close();
    }

    public static PrintWriter out;

    public static class MyScanner {
        BufferedReader br;
        StringTokenizer st;

        public MyScanner() {
            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.util.*;
import java.io.*;
import java.math.BigInteger;

public class Main {
    public static void main(String[] args) {
        MyScanner scn = new MyScanner();
        out = new PrintWriter(new BufferedOutputStream(System.out));

        // Start writing your solution here. -------------------------------------

        /*
         * int n = sc.nextInt(); // read input as integer long k = sc.nextLong(); //
         * read input as long double d = sc.nextDouble(); // read input as double String
         * str = sc.next(); // read input as String String s = sc.nextLine(); // read
         * whole line as String
         * 
         * int result = 3*n; out.println(result); // print via PrintWriter
         */

        // Stop writing your solution here. -------------------------------------
        String s = scn.next();
        // BigInteger input = new BigInteger(s);
        BigInteger ans = new BigInteger("0");

        for (int i = 0; i < s.length(); i++) {
            int val = s.charAt(i) - '0';
            ans = ans.add(BigInteger.valueOf(val));
        }
        out.println(ans.mod(BigInteger.valueOf(9)) == BigInteger.valueOf(0) ? "Yes" : "No");

        out.close();
    }

    public static PrintWriter out;

    public static class MyScanner {
        BufferedReader br;
        StringTokenizer st;

        public MyScanner() {
            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;
        }

    }

}