56 lines
2.2 KiB
Markdown
56 lines
2.2 KiB
Markdown
# Push Swap
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Push Swap is a 2 stack sorting algoritm, The goal is to sort the input in as few moves as possible\
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I wrote my own algoritm which is a combination of quick sort and bubble sort as radix is very bad with only 2 stacks\
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The following is a list of the moves we are allowed to make
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| Move | Description |
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| -- | ------ |
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| pa | Pushes the top number from stack B to stack A |
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| pb | Pushes the top number from stack A to stack B |
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| sa | Swaps the top 2 numbers in stack A |
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| sb | Swaps the top 2 numbers in stack B |
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| ss | Swaps the top 2 numbers in stack A and in Stack B |
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| ra | Rotates Stack A moves all items forward so the last item becomes the first |
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| rb | Rotates Stack B moves all items forward so the last item becomes the first |
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| rr | Rotates Both stacks moves all items forward, so the last item becomes the first |
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| rra | Reverse Rotates Stack A moves all items backwards, so the first item becomes the last |
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| rrb | Reverse Rotates Stack B moves all items backwards, so the first item becomes the last |
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| rrr | Reverse Rotates Both stacks moves all items backwards, so the first item becomes the last |
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---
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## Improvements
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#### Improve 5 numbers algoritm
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simply hardcode all possibilities with 5 numbers or less
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#### Improve more than 30 algoritm
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Gotta figure this out to always stay under the goals
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---
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## Usage
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#### Sorter
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1. Simply clone or download the repository
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2. Run `make` in the cloned directory
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3. Start the program with `./push_swap [numbers seperated by space]`
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4. It will return the list of moves to sort the stack
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#### Checker
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1. Simply clone or download the repository
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2. Run `make bonus` in the cloned directory
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3. Start the program with `./checker [numbers seperated by space]`
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4. You will have to input moves seperated by a return and when you are done press CTRL + D
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5. It will return a OK or a KO.
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#### Both
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1. You can also run both programs with `./push_swap [numbers] | ./checker [same numbers]`
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---
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## Tester
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#### Todo
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- test "-" as argument
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- check for -Wall -Werror -Wextra
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#### Usage
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1. Download test.sh to your push swap directory
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2. Make the file executable `chmod +x test.sh`
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3. Run `./test.sh` to start the test
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---
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[This project is part of the studies at 42](https://42.fr/en/homepage/)
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