import java.io.*;

class Demo {
    public static void main(String[] args) throws Exception {
        BufferedReader in = null;
        int sum = 0;
        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();
    }
}