Solution: Plus One
Explore how to add one to a non-negative integer represented as an array of digits by applying arithmetic addition rules and handling carries. Understand the step-by-step process to increment the number from the least significant digit while managing edge cases like all digits being nine. This lesson helps you implement this essential pattern with optimal time and space complexity.
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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:
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