import java.io.*;

public class ScoreAverage1 {
    public static void main(String[] args)  {
        String line;
        int sum = 0;
        int count = 0;
        try (BufferedReader br = new BufferedReader(new FileReader("score_empt.txt"))) {
            while ((line = br.readLine()) != null) {
                sum += Integer.parseInt(line);
                count++;
            }
            double average = (double) sum / count;
            System.out.println("Average score: " + average);
        } catch (NumberFormatException e) {
            System.out.println("Invalid number format in file: " + e.getMessage());
        } catch (FileNotFoundException e) {
            System.out.println("File not found: " + e.getMessage());
        } catch (IOException e) {
            System.out.println("An error occurred: " + e.getMessage());
        }
    }
}