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

public class SumNumbersFromTextFile {

    public static void main(String[] args) {
        try{
            BufferedReader reader = new BufferedReader(new FileReader("input.txt"));
            String line = null;
            int result = 0;
            while ((line = reader.readLine()) != null) {
                result+=Integer.parseInt(line);
            }
            System.out.println(result);
        }
        catch(Exception ex){
            System.out.println("(missing file)");
        }
    }

}