import java.util.*;

public class OverflowCheck {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        
        try {
            int a = Integer.parseInt(scanner.nextLine().trim());
            int b = Integer.parseInt(scanner.nextLine().trim());

            // Check for overflow
            if ((b > 0 && a > Integer.MAX_VALUE - b) ||
                (b < 0 && a < Integer.MIN_VALUE - b)) {
                System.out.println("Overflow detected");
            } else {
                System.out.println(a + b);
            }

        } catch (NumberFormatException e) {
            System.out.println("Invalid input");
}
}
}