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Grokking the Coding Interview Patterns in Python

Solution: Next Permutation

Explore the next permutation problem by learning how to rearrange an array into the next lexicographically greater order. Understand the two-pointer approach for finding pivot and successor elements, swapping them, and reversing the suffix to achieve an in-place solution using constant extra space.

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Statement

Your task is to rearrange an array, nums, containing positive integers to form the next lexicographically greater permutationA permutation of an array of integers refers to any ordering of its elements into a sequence or linear arrangement.. This means finding the next permutation in the sequence of all possible arrangements sorted in dictionary order.

For example, given the array [4,5,6][4, 5, 6], the next permutation is [4,6,5][4, 6, 5]. In the same way, [5,6,4][5, 6, 4] becomes [6,4,5][6, 4, 5] ...