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Add Numbers Represented as Arrays

YandexTinkoffAvito

Write a function that takes two arrays arr1 and arr2 as input, representing numbers, and returns their sum as an array.

- Each element of arrays arr1 and arr2 represents one digit of the number.
- The result should also be represented as an array, where each element is one digit.
- If there are leading zeros in the result, they should be preserved.

Input 1: [1, 2, 3], [4, 5, 6]

Output 1: [5, 7, 9]

Input 2: [5, 4, 4], [4, 5, 6]

Output 2: [1, 0, 0, 0]

JavaScript•UTF-8

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