diff --git a/subjects/push-swap.en.md b/subjects/push-swap.en.md
deleted file mode 100644
index d57337a3d..000000000
--- a/subjects/push-swap.en.md
+++ /dev/null
@@ -1,152 +0,0 @@
-## push-swap
-
-### Objectives
-
-Push_swap is a very simple and highly effective algorithm.You have at your disposal a list of `int` values, two stacks (`a` and `b`) and a set of instructions.
-
-You will have two write 2 programs:
-
-- **push_swap**, which calculates and displays on the standard output the smallest program using push_swap instruction language that sorts integer arguments received.
-- **checker**, which takes integer arguments and reads instructions on the standard output. Once read, checker executes them and displays `OK` if integers are sorted. Otherwise, it will display `KO`.
-
-As said before, you will have two stacks at your disposal. Your goal is to sort stack `a`, that will contain the `int` values received, in ascending order, using both stacks and a set of instructions.
-
-These are the instructions that you can use to sort the stack :
-
-- `pa` push the top first element of stack `b` to stack `a`
-- `pb` push the top first element of stack `a` to stack `b`
-- `sa` swap first 2 elements of stack `a`
-- `sb` swap first 2 elements of stack `b`
-- `ss` execute `sa` and `sb`
-- `ra` rotate stack `a` (shift up all elements of stack `a` by 1, the first element becomes the last one)
-- `rb` rotate stack `b`
-- `rr`execute `ra` and `rb`
-- `rra` reverse rotate `a` (shift down all elements of stack `a` by 1, the first element becomes the last one)
-- `rrb` reverse rotate `b`
-- `rrr` execute `rra` and `rrb`
-
-#### Example
-
-```console
----------------------------------------
-Init a and b :
-2
-1
-3
-6
-8
-5
-= =
-a b
----------------------------------------
-Exec sa :
-1
-2
-3
-6
-8
-5
-= =
-a b
----------------------------------------
-Exec pb pb pb :
-6 3
-8 2
-5 1
-= =
-a b
----------------------------------------
-Exec ra rb (equivalent to rr):
-8 2
-5 1
-6 3
-= =
-a b
----------------------------------------
-Exec rra and rrb (equivalent to rrr):
-6 3
-8 2
-5 1
-= =
-a b
----------------------------------------
-Exec sa:
-8 3
-6 2
-5 1
-= =
-a b
----------------------------------------
-Exec pa pa pa:
-1
-2
-3
-5
-6
-8
-= =
-a b
----------------------------------------
-```
-
-This project will help you learn about :
-
-- the use of basic algorithms
-- the use of sorting algorithms
-- the use of stacks
-
-#### The push_swap program
-
-- You have to write a program named push_swap, which will receive as an argument the stack a formatted as a list of integers. The first integer should be at the top of the stack.
-- The program must display the smallest list of instructions possible to sort the stack `a`, with the smallest number being at the top.
-- Instructions must be separated by a `\n` and nothing else.
-- The goal is to sort the stack with the minimum possible number of operations.
-- In case of error, you must display `Error` followed by a `\n` on the standard error. Errors include for example: some arguments aren’t integers and/or there are duplicates.
-
-```console
-$>./push_swap 2 1 3 6 5 8
-sa
-pb
-pb
-pb
-sa
-pa
-pa
-pa
-$>./push_swap 0 one 2 3
-Error
-$>
-```
-
-#### The checker program
-
-- You have to write a program named checker, which will get as an argument the stack a formatted as a list of integers. The first argument should be at the top of the stack (be careful about the order). If no argument is given checker stops and displays nothing.
-- Checker will then read instructions on the standard input, each instruction will be followed by `\n`. Once all the instructions have been read, checker will execute them on the stack received as an argument.
-- If after executing those instructions, stack `a` is actually sorted and `b` is empty, then checker must display "OK" followed by a `\n` on the standard output. In every other case, checker must display "KO" followed by a `\n` on the standard output.
-- In case of error, you must display Error followed by a `\n` on the standard error. Errors include for example: some arguments are not integers, there are duplicates, an instruction don’t exist and/or is incorrectly formatted.
-
-```console
-$>./checker 3 2 1 0
-rra
-pb
-sa
-rra
-pa
-OK
-$>./checker 3 2 1 0
-sa
-rra
-pb
-KO
-$>./checker 3 2 one 0
-Error
-$>
-```
-
-### Instructions
-
-- Your project must be written in **Go**.
-- The code must respect the [**good practices**](https://github.com/01-edu/public/good-practices.en.md).
-- It is recommended that the code should present a **test file**.
-- The first executable file must be named **checker** and the second **push_swap**.
-- You have to be able to handle the errors.