programming-challenges/challenges/heap-algorithm/README.md

# heap-algorithm

Created by [@theoludwig](https://github.com/theoludwig) on 8 November 2021.

## Instructions

Write a program that generates all possible unique permutations of a string.

The order of the generated permutations is important, see the example below.

## Source

- [Heap's Algorithm - Wikipedia](https://en.wikipedia.org/wiki/Heap%27s_algorithm)

## Examples

### Example 1

#### Input

```txt
abc
```

#### Output

```txt
abc
bac
cab
acb
bca
cba
```

See the `test` folder for examples of input/output.