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Grokking the Coding Interview Patterns in Go

Solution: Next Permutation

Explore how to compute the next lexicographical permutation of an integer array using a two-pointer approach. Understand finding the pivot and successor elements to perform minimal swaps, and reversing the suffix to obtain the next permutation in-place with constant extra memory.

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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  ...