Envío 2937

Código

import java.util.Arrays;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Data data = readWordFromStdin();

        int carry = data.addingNumber;
        for (int index = data.number.length - 1; index >= 0; index--) {
            int sum = data.number[index] + carry;
            data.number[index] = (char) (sum % 10);
            carry = sum / 10;

            if (carry == 0) {
                break;
            }
        }

        if (carry != 0) {
            int[] newArrayWithExtraCarry = new int[data.number.length + 1];
            newArrayWithExtraCarry[0] = carry;
            System.arraycopy(data.number, 0, newArrayWithExtraCarry, 1, newArrayWithExtraCarry.length - 1);
            data.number = newArrayWithExtraCarry;
        }

        printArray(data.number);
    }

    private static void printArray(int[] array) {
        for (int number : array) {
            System.out.print(number);
        }
    }

    private static Data readWordFromStdin() {
        Data data = new Data();
        Scanner in = new Scanner(System.in);

        String line = in.nextLine();
        int[] numbers = new int[line.length()];
        for (int i = 0; i < line.length(); i++) {
            numbers[i] = Integer.valueOf(String.valueOf(line.charAt(i)));
        }

        data.number = numbers;
        data.addingNumber = in.nextInt();
        return data;
    }

    private static class Data {
        int[] number;
        int addingNumber;
    }
}