import java.util.HashSet;
import java.util.Scanner;
import java.util.Set;


public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);

        String s = in.next();
        Set<String> set = new HashSet<String>();
        int l = s.length();

        for (int i = 0; i < l; i++) {
            for (int j = i + 1; j < l; j++) {
                for (int k = j + 1; k < l; k++) {
                    String c = "";
                    char s1 = s.charAt(i), s2 = s.charAt(j), s3 = s.charAt(k);
                    if (s1 == '0') continue;
                    c += s1;
                    c += s2;
                    c += s3;
                    set.add(c);
                }
            }
        }

        System.out.println(set.size());
    }
}