Web Reference: In-depth solution and explanation for LeetCode 66. Plus One in Python, Java, C++ and more. Intuitions, example walk through, and complexity analysis. Better than official and forum solutions. Plus One - You are given a large integer represented as an integer array digits, where each digits [i] is the ith digit of the integer. The digits are ordered from most significant to least significant in left-to-right order. Starting from index 0 and adding one there ignores how arithmetic carry propagates from the least significant digit. Always process from the last element toward the first to correctly simulate manual addition.
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