import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;

public class prog {

    private static Set<String> numbers = new HashSet<String>();

    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        String nr9 = br.readLine();
        int length = nr9.length();

        for (int i = 2; i < length; i++) {
            for (int j = 0; j < 10; j++) {
                String s1 = String.valueOf(j);
                String newnR = nr9.substring(0, i) + s1 + nr9.substring(i);
                numbers.add(newnR);
            }

        }

        for (int j = 0; j < 10; j++) {
            String s1 = String.valueOf(j);
            String newnR = nr9 + s1;
            numbers.add(newnR);
        }

        System.out.println(numbers.size());





    }




}