import java.io.*;

class Demo {
    public static void main(String[] args) {
        BufferedReader in = null;
        int sum = 0;
        try {
            in = new BufferedReader(new FileReader(args[0]));
            String line;
            line = in.readLine();
            int n = 0;
            try {
                n = Integer.parseInt(line);
            } catch (NumberFormatException e) {
                System.out.println("invalid number");
            }
            sum += n;
            System.out.println("The sum is " + sum);
            in.close();
        } catch (IOException e) {
            System.out.println(e);
        }
    }
}