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Solution: Plus One

Understand how to add one to an integer represented as a digit array by applying arithmetic addition rules from right to left, handling carries. Explore the implementation details, time and space complexity, and how to effectively update the array or create a new one when all digits are nine.

Statement

You are given a non-negative integer represented as an integer array, digits, where each element in digits[i] corresponds to a single digit of the integer. The digits are arranged from most significant (left) to least significant (right), and the number has no leading zeros.

Your task is to add one to this integer and return the updated number in the same digit-array format.

Constraints:

  • 11 \leq digits.length 100\leq 100

  • 00 \leq digits[i] 9\leq 9 ...