diff --git a/.gitignore b/.gitignore
index df7cd48..3a271bd 100644
--- a/.gitignore
+++ b/.gitignore
@@ -58,7 +58,7 @@ dkms.conf
 *.swp
 
 # Executable
-pushswap
+push_swap
 
 # File obj
 obj/
diff --git a/Makefile b/Makefile
index b7f2ab5..37e2663 100644
--- a/Makefile
+++ b/Makefile
@@ -16,6 +16,8 @@ MEDIUM_DIR = medium
 
 COMPLEX_DIR = radix
 
+FLAGS_DIR = flags
+
 INCLUDES = headers
 
 #============================
@@ -26,7 +28,9 @@ SRC = main.c test_one.c
 
 INSERTION = insertion.c
 
-PARSING = ft_atoi.c parsing.c parsing_2.c
+FLAGS_FILES = algorithms_sort.c flag.c
+
+PARSING = ft_atoi.c parsing.c ft_strncmp.c
 
 STACK_UTILS = push.c rev_rotate.c rotate.c stack_add.c stack_remove.c stacks_len.c swap.c print_stacks.c
 
diff --git a/algorithms/insertion/insertion.c b/algorithms/insertion/insertion.c
index f5fe9ca..2b403f4 100644
--- a/algorithms/insertion/insertion.c
+++ b/algorithms/insertion/insertion.c
@@ -24,7 +24,8 @@ static int	to_insert(t_stacks *stacks, int sorted)
 	a = stacks->a;
 	while (i < sorted)
 	{
-		if (stacks->b->value > a->previous->value && stacks->b->value <= a->value)
+		if (stacks->b->value > a->previous->value
+			&& stacks->b->value <= a->value)
 			return (i);
 		a = a->previous;
 		i++;
diff --git a/algorithms/medium/sort_utils.c b/algorithms/medium/sort_utils.c
index afea4b4..66424fa 100644
--- a/algorithms/medium/sort_utils.c
+++ b/algorithms/medium/sort_utils.c
@@ -92,4 +92,4 @@ void	push_range_to_b(t_stacks *piles, t_tab *one_preset, int range)
 		sort_little_pile(piles);
 		one_preset->nb_in--;
 	}
-}
\ No newline at end of file
+}
diff --git a/algorithms/medium/utils_medium.c b/algorithms/medium/utils_medium.c
index 0e09104..5b78da6 100644
--- a/algorithms/medium/utils_medium.c
+++ b/algorithms/medium/utils_medium.c
@@ -32,11 +32,14 @@ int	get_next_lower(t_stack *first, int old_lower)
 {
 	t_stack	*tmp;
 	int		next_lower;
+	int		skip_first;
 
 	tmp = first;
+	skip_first = 1;
 	next_lower = 2147483647;
-	while (tmp->next != first)
+	while (tmp != first || skip_first)
 	{
+		skip_first = 0;
 		if (old_lower < tmp->value && tmp->value <= next_lower)
 		{
 			next_lower = tmp->value;
diff --git a/algorithms/medium/utils_medium_two.c b/algorithms/medium/utils_medium_two.c
index 8ff6ad6..70d91ed 100644
--- a/algorithms/medium/utils_medium_two.c
+++ b/algorithms/medium/utils_medium_two.c
@@ -64,7 +64,7 @@ int	range_bucket(t_stack *first)
 	int	sqrt;
 
 	len = stack_len(first);
-	diff = (get_max_number(first) - get_min_number(first)) ;
+	diff = get_max_number(first) - get_min_number(first);
 	sqrt = my_sqrt(len);
 	if (diff / sqrt < 2)
 	{
diff --git a/flags/algorithms_sort.c b/flags/algorithms_sort.c
new file mode 100644
index 0000000..a0f9b28
--- /dev/null
+++ b/flags/algorithms_sort.c
@@ -0,0 +1,42 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   algorithms_sort.c                                  :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: mteriier <mteriier@student.42lyon.fr>      +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/01/07 12:15:02 by mteriier          #+#    #+#             */
+/*   Updated: 2026/01/07 12:15:05 by mteriier         ###   ########lyon.fr   */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "push_swap.h"
+#include "medium_algo.h"
+
+void	simple(t_stacks *piles)
+{
+	int	len;
+
+	len = stack_a_len(piles);
+	insertion(piles, len);
+}
+
+void	medium(t_stacks *piles)
+{
+	t_tab	*buckets;
+	int		range;
+
+	range = range_bucket(piles->a);
+	buckets = get_tabs(piles->a, range);
+	bucket_algo(piles, buckets, range);
+}
+
+void	complex(t_stacks *piles)
+{
+	return ;
+}
+
+void	adaptive(t_stacks *piles)
+{
+	return ;
+}
diff --git a/flags/flag.c b/flags/flag.c
new file mode 100644
index 0000000..31e0811
--- /dev/null
+++ b/flags/flag.c
@@ -0,0 +1,28 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   flag.c                                             :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: mteriier <mteriier@student.42lyon.fr>      +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/01/07 12:39:29 by mteriier          #+#    #+#             */
+/*   Updated: 2026/01/07 12:39:31 by mteriier         ###   ########lyon.fr   */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "push_swap.h"
+#include "parsing.h"
+
+void	flags(int pos, char **argv, t_stacks *piles)
+{
+	if (ft_strncmp(argv[pos], "--simple", 30) && pos > 0)
+		simple(piles);
+	else if (ft_strncmp(argv[pos], "--medium", 30) && pos > 0)
+		medium(piles);
+	else if (ft_strncmp(argv[pos], "--complex", 30) && pos > 0)
+		complex(piles);
+	else if (ft_strncmp(argv[pos], "--adaptive", 30) && pos > 0)
+		adaptive(piles);
+	else
+		adaptive(piles);
+}
diff --git a/headers/flags.h b/headers/flags.h
new file mode 100644
index 0000000..90130e2
--- /dev/null
+++ b/headers/flags.h
@@ -0,0 +1,22 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   flags.h                                            :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: mteriier <mteriier@student.42lyon.fr>      +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/01/07 13:05:52 by mteriier          #+#    #+#             */
+/*   Updated: 2026/01/07 13:05:53 by mteriier         ###   ########lyon.fr   */
+/*                                                                            */
+/* ************************************************************************** */
+
+#ifndef FLAGS_H
+# define FLAGS_H
+
+void	simple(t_stacks *piles);
+void	medium(t_stacks *piles);
+void	complex(t_stacks *piles);
+void	adaptive(t_stacks *piles);
+void	flags(int pos, char **argv, t_stacks *piles);
+
+#endif
diff --git a/headers/parsing.h b/headers/parsing.h
index a42d78e..72ac070 100644
--- a/headers/parsing.h
+++ b/headers/parsing.h
@@ -13,8 +13,8 @@
 #ifndef PARSING_H
 # define PARSING_H
 
-int	        ft_atoi(const char *nptr);
-t_stacks	*init_big_stacks2(int *tab, int len);
+int			ft_atoi(const char *nptr);
 t_stacks	*init_big_stacks(int argc, char **argv);
+int			ft_strncmp(const char *s1, const char *s2, int n);
 
 #endif
diff --git a/headers/push_swap.h b/headers/push_swap.h
index f47f445..516b731 100644
--- a/headers/push_swap.h
+++ b/headers/push_swap.h
@@ -45,6 +45,7 @@ t_stack	*new_stack(int value);
 void	stack_add_back(t_stack **stack, t_stack *new);
 void	stack_add_front(t_stack **stack, t_stack *new);
 void	stack_clear_all(t_stack *stack, t_stack *first);
+void	free_all(t_stacks *piles);
 /* STACKS LEN FILES */
 int		stack_a_len(t_stacks *stacks);
 int		stack_b_len(t_stacks *stacks);
diff --git a/parsing/ft_strncmp.c b/parsing/ft_strncmp.c
new file mode 100644
index 0000000..67f36b5
--- /dev/null
+++ b/parsing/ft_strncmp.c
@@ -0,0 +1,25 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   ft_strncmp.c                                       :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: mteriier <mteriier@student.42lyon.fr>      +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/01/07 12:36:38 by mteriier          #+#    #+#             */
+/*   Updated: 2026/01/07 12:36:40 by mteriier         ###   ########lyon.fr   */
+/*                                                                            */
+/* ************************************************************************** */
+
+int	ft_strncmp(const char *s1, const char *s2, int n)
+{
+	int	i;
+
+	i = 0;
+	if (n == 0)
+		return (0);
+	while (i < n - 1 && s1[i] && s1[i] == s2[i])
+	{
+		i++;
+	}
+	return ((unsigned char)s1[i] - (unsigned char)s2[i]);
+}
diff --git a/parsing/parsing_2.c b/parsing/parsing_2.c
deleted file mode 100644
index b1f653f..0000000
--- a/parsing/parsing_2.c
+++ /dev/null
@@ -1,55 +0,0 @@
-/* ************************************************************************** */
-/*                                                                            */
-/*                                                        :::      ::::::::   */
-/*   parsing_2.c                                        :+:      :+:    :+:   */
-/*                                                    +:+ +:+         +:+     */
-/*   By: mteriier <mteriier@student.lyon42.fr>      +#+  +:+       +#+        */
-/*                                                +#+#+#+#+#+   +#+           */
-/*   Created: 2025/12/22 13:10:58 by mteriier          #+#    #+#             */
-/*   Updated: 2025/12/22 13:11:21 by mteriier         ###   ########.fr       */
-/*                                                                            */
-/* ************************************************************************** */
-
-#include "push_swap.h"
-#include <stdlib.h>
-
-static t_stack	*parsing2(int *tab, int len)
-{
-	int		i;
-	int		stock;
-	t_stack	*first;
-	t_stack	*new;
-
-	i = 0;
-	first = NULL;
-	while (i < len)
-	{
-		stock = tab[i];
-		new = new_stack(stock);
-		if (!new && !first)
-			return (NULL);
-		else if (!new)
-		{
-			stack_clear_all(first, first);
-			return (NULL);
-		}
-		stack_add_back(&first, new);
-		i++;
-	}
-	return (first);
-}
-
-t_stacks	*init_big_stacks2(int *tab, int len)
-{
-	t_stacks	*stacks;
-	t_stack		*a;
-
-	stacks = malloc(sizeof(t_stacks));
-	stacks->a = NULL;
-	stacks->b = NULL;
-	if (!stacks)
-		return (NULL);
-	a = parsing2(tab, len);
-	stacks->a = a;
-	return (stacks);
-}
diff --git a/stack_utils/stack_remove.c b/stack_utils/stack_remove.c
index cf23ef8..a8561d3 100644
--- a/stack_utils/stack_remove.c
+++ b/stack_utils/stack_remove.c
@@ -21,3 +21,12 @@ void	stack_clear_all(t_stack *stack, t_stack *first)
 		stack_clear_all(stack->next, first);
 	free(stack);
 }
+
+void	free_all(t_stacks *piles)
+{
+	if (piles->a)
+		stack_clear_all(piles->a, piles->a);
+	if (piles->b)
+		stack_clear_all(piles->b, piles->b);
+	free(piles);
+}
diff --git a/test_one.c b/test_one.c
index 21ffbeb..7c47995 100644
--- a/test_one.c
+++ b/test_one.c
@@ -29,10 +29,7 @@ int	test1(int argc, char **argv)
 		//bucket_algo(piles, preset, range_bucket(piles->a));
 		radix(piles);
 	}
-	if (piles->a)
-		stack_clear_all(piles->a, piles->a);
-	if (piles->b)
-		stack_clear_all(piles->b, piles->b);
+	free_all(piles);
 	free(piles);
 	return (0);
 }