The aim of this project is to sort a stack of numbers, using a limited set of instructions, and the lowest possible number of actions. You will have to look into different types of algorithms and choose the most appropriate one for an optimized solution.
push_swap is a straigh-forward and effective algorithm project: There is data. Said data needs to be sorted. You have a set of integers, 2 stacks (stack a, and stack b) and a set of instructions to manipulate both stacks.
This project contains 2 programs:
The first, called push_swap which will receive a list of integers as arguments. The program must display the smallest list of instructions possible to sort the stack a, the smallest number being at the top.
The second one, checker (which is a bonus part of the project), also takes a list of integers and will read instructions on the standard input. Once read,checker executes them and displays OK if the entered insturctions result in the integers being properly sorted. Otherwise, it will display KO.
sa: swap a - swap the first 2 elements at the top of stack a. Do nothing if there is only one or no elements.
sb: swap b - swap the first 2 elements at the top of stack b. Do nothing if there is only one or no elements.
ss: sa and sb at the same time.
pa: push a - take the first element at the top of b and put it at the top of a. Do nothing if b is empty.
pb: push b - take the first element at the top of a and put it at the top of b. Do nothing if a is empty.
ra: rotate a - shift up all elements of stack a by 1. The first element becomes the last one.
rb: rotate b - shift up all elements of stack b by 1. The first element becomes the last one.
rr: ra and rb at the same time.
rra: reverse rotate a - shift down all elements of stack a by 1. The last element becomes the first one.
rrb: reverse rotate b - shift down all elements of stack b by 1. The last element becomes the first one.
rrr: rra and rrb at the same time.
To compile checker, run:
make checker
To compile push_swap, run:
make push_swap
To compile both, run:
make
push_swap
Example: ./push_swap -9 8 3 20 -5
checker
Exapmle: ./checker -9 8 3 20 -5 then will wait for your input
Both
To execute both push_swap and checker: ./push_swap -9 8 3 20 -5 | ./checker -9 8 3 20 -5
