ade-verd / 42_push_swap

Tri de données sur une pile avec un set d’instructions limité, tout en utilisant le moins de coups possible.

42-push_swap

Because swap_push isn't as natural

Given a set of integers, sort it using a predefined set of instructions using two stacks. The instruction set is defined below. This program outputs a program in push_swap instructions that sorts the input integers.

Instruction set

For the following instructions, if the instruction is not possible, the part of it that can't be executed won't.

Code	Instruction	Action
sa	swap a	swaps the 2 top elements of stack a
sb	swap b	swaps the 2 top elements of stack b
ss	swap a + swap b	both sa and sb
pa	push a	moves the top element of stack b at the top of stack a
pb	push b	moves the top element of stack a at the top of stack b
ra	rotate a	shifts all elements of stack a from bottom to top
rb	rotate b	shifts all elements of stack b from bottom to top
rr	rotate a + rotate b	both ra and rb
rra	reverse rotate a	shifts all elements of stack a from top to bottom
rrb	reverse rotate b	shifts all elements of stack b from top to bottom
rrr	reverse rotate a + reverse rotate b	both rra and rrb

Compiling

1. Run make
2. Then run make submod_init

Running

./push_swap 1 2 3 4
./checker 1 2 3 4

./push_swap 1 2 3 4 | ./checker 1 2 3 4

ARG="1 2 3 4"
./push_swap $ARG | ./checker $ARG

/*Generates 100 values from 1 to 100 */
ARG=$(ruby -e "puts (1..100).to_a.shuffle.join(' ')")
./push_swap $ARG | ./checker $ARG

Options

Usage   ./push_swap [-h] $ARG [-f] [*.txt]
——————
-h      [Help] displays this help
-f      [File] writes movements to *.txt file (if specified)
        If no output file is specified, the file will be output.txt

Usage   ./checker [-h] $ARG [-lscfv] [*.txt]
——————
-h      [Help] displays this help
-l      [Lines] displays the number of movements
-s      [Steps] displays details of each stack
-c      [Color] displays only last movement (desactivated with -s)
-f      [File] reads movements from a *.txt file which is specified
-v      [Viewer] displays a graphical viewer
——————
Viewer  [KEY_UP] Next move
Viewer  [KEY_DOWN] Previous move
Viewer  [PAGE_UP] Speed up
Viewer  [PAGE_DOWN] Speed down
Viewer  [ESC] Quit

Scripts

Running

1. run ./tester.sh
2. or run ./analyser.sh made by @roulinalexandre

Performances with analyser.sh

Random values	Goal	Performances
5 random values	≤ 12
100 random values	≤ 700
500 random values	≤ 5300