import java.io.File;
import java.io.FileNotFoundException;
import java.util.*;

public class Main {

    public static void main(String[] args) throws FileNotFoundException {
	// write your code here
        File file = new File("C:\\Users\\tongwan\\Documents\\test_input.txt");
        Scanner scanner = new Scanner(file);
        List<Integer> integers = new ArrayList<>();
        while (scanner.hasNext()) {
            if (scanner.hasNextInt()) {
                integers.add(scanner.nextInt());
            } else {
                scanner.next();
            }
        }
        System.out.println(integers.size());
        Arrays.sort(integers.toArray());
        Collections.sort(integers);
    }
}