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Solution: Plus One

Explore how to add one to a non-negative integer represented as an array of digits by applying standard arithmetic addition and carry rules. Understand how to handle edge cases like all digits being nine and achieve an efficient O(N) time solution.

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 ...