import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;

public class _08_SumNumbersFromTextFile {

    public static void main(String[] args) {

        BufferedReader br = null;
        int result = 0;
        try {

            String currentLine;

            br = new BufferedReader(new FileReader("Input.txt"));

            while ((currentLine = br.readLine()) != null) {
                result += Integer.parseInt(currentLine);
            }
            System.out.println(result);

        } catch (IOException e) {
            System.out.println("Error!");
        } finally {
            try {
                if (br != null){
                    br.close();
                }
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }

    }

}