import java.io.*;

public class Main {

    public static void main(String[] args) {
	    String fileName = "adunare";
	    int result = 0;

	    String line = null;
        try {
            FileReader fileReader =
                    new FileReader(fileName + ".in");

            BufferedReader bufferedReader =
                    new BufferedReader(fileReader);

            while((line = bufferedReader.readLine()) != null) {
                {
                    result = result + Integer.parseInt(line);
                }
            }

            bufferedReader.close();
        }
        catch(FileNotFoundException ex) {
        }
        catch(IOException ex) {
        }

        try {
            FileWriter fileWriter =
                    new FileWriter(fileName + ".out");

            BufferedWriter bufferedWriter =
                    new BufferedWriter(fileWriter);

            bufferedWriter.write(String.valueOf(result));

            bufferedWriter.close();
        }
        catch(IOException ex) {
            System.out.println(
                    "Error writing to file '"
                            + fileName + "'");
        }
    }
}