[Devmates.co] Subtract Two Integers Represented as Array by 🏢Google

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My name is Alex and I'm maker of Devmates.co. 😊

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I get this problem from our members or just searching them in the internet(leetcode forums, Glassdoor, teamblind, etc.). Sometimes this problem can be very easy, sometimes too 👷‍♂️hard, everything depends on skills but we are trying to resolve all of them and Have Fun. 🙌

Today I want to share problem which was asked by 🏢Google.

Problem:

Given a non-empty array of digits representing a non-negative integer and each element in the array contain a single digit.

Subtract two integers represented as array and return result as array.

You may assume the integer does not contain any leading zero, except the number 0 itself.

Note: Converting to the integer and back to the array is not allowed.

Example:

Input: num1 = [3, 4, 5], num2 = [2,2,1]
Output: [1, 2, 4]

Input: num1 = [1, 0], num2 = [9]
Output: [1]

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