Add

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

final class Add {

    public static void main(final String[] args) {
        try (final Scanner scanner = new Scanner(System.in)) {
            final int[] one = toArrayReverse(scanner.nextLine());
            final int[] two = toArrayReverse(scanner.nextLine());
            System.out.println(Arrays.toString(one) + " + " + Arrays.toString(two) + " = " + Arrays.toString(add(one, two)));
        }
    }

    private static int[] toArrayReverse(final String str) {
        final int[] array = new int[str.length()];
        for (int i = 0; i < array.length; i++) {
            array[i] = str.charAt(i) - '0';
        }
        return reverse(array);
    }

    private static int[] add(int[] array1, int[] array2) {
        int[] sum = array1.length > array2.length ? array1.clone() : array2.clone();
        final int[] other = array1.length > array2.length ? array2 : array1;

        boolean carry = false;
        for (int i = 0; i < sum.length; i++) {
            final int sumValue = (i < sum.length) ? sum[i] : 0;
            final int otherValue = (i < other.length) ? other[i] : 0;
            final int value = sumValue + otherValue + (carry ? 1 : 0);
            sum[i] = value % 10;
            carry = value > 9;
        }

        if (carry) {
            final int[] temp = new int[sum.length + 1];
            temp[0] = 1;
            System.arraycopy(sum, 0, temp, 1, sum.length);
            sum = temp;
        }
        return reverse(sum);
    }

    private static int[] reverse(final int[] array) {
        for(int i = 0; i < array.length / 2; i++) {
            final int temp = array[i];
            array[i] = array[array.length - i - 1];
            array[array.length - i - 1] = temp;
        }
        return array;
    }
}