import java.math.BigInteger;
import java.util.Scanner;
import java.io.File;

public class Problem_13_Large_Sum_File {

    public static void main(String[] args) {
    
        try {
            Scanner scanner = new Scanner(new File("C:\\Users\\Mike\\Desktop\\Problem_13_Large_Sum_Number.txt"));
            BigInteger sum = BigInteger.ZERO;
            while (scanner.hasNextLine()) {
                sum = sum.add(new BigInteger(scanner.nextLine()));
            }
            System.out.println( sum.toString().substring(0, 10) );
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}