Problems Based on Permutation Arrays
| Problem | Post Link |
|---|---|
| Finding the kth permutation of an array | Read |
| Inverting a permutation array | Read |
| Reordering elements of an array based on a permutation | Read |
| Sorting an array using a permutation array | Read |
| Generating all permutations of an array | Read |
| Finding the rank of a permutation within all permutations | Read |
| Testing if two permutations are inverses of each other | Read |
| Shuffling an array randomly using a permutation array | Read |
| Permuting elements in a matrix based on row/column permutations | Read |
These problems involve various operations and applications related to permutation arrays, ranging from basic tasks like finding permutations to more complex operations such as inverting permutations or sorting using a permutation array.
What is a Permutation Array in DSA?
A permutation array, often called a permutation or permuted array, is an arrangement of elements from a source array in a specific order different from their original placement.
The critical characteristic of a permutation array is that it contains all the elements from the source array but in a different order.
Imagine you have an array of elements, such as [1, 2, 3]. A permutation of this array, like [3, 1, 2], represents a different order of the original elements.