diff --git a/sorting.c b/sorting.c
new file mode 100644
index 0000000..7a106d2
--- /dev/null
+++ b/sorting.c
@@ -0,0 +1,110 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   sorting.c                                          :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: apommier <apommier@student.42.fr>          +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2022/01/07 19:14:03 by apommier          #+#    #+#             */
+/*   Updated: 2022/01/07 19:14:03 by apommier         ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "push_swap.h"
+
+void	find_loop_index(t_list *list)
+{
+	t_list	*start;
+	t_list	*save;
+	int		loop_size;
+	int		loop_size2;
+
+	loop_size2 = 0;
+	loop_size = 0;
+	start = list;
+	while (list)
+	{
+		loop_size = find_loop(start, list, 0);
+		if (loop_size > loop_size2)
+		{
+			loop_size2 = loop_size;
+			save = list;
+		}
+		list = list->next;
+	}
+	find_loop(start, save, 1);
+	printf("loop_size = %d\n", loop_size2);
+}
+
+int	find_loop(t_list *start, t_list *list, int setswap)
+{
+	int countdown;
+	int	loop_size;
+	t_list	*swap;
+
+	loop_size = 0;
+	swap = list->next;
+	countdown = ft_lstsize(start) - 1;
+	while (countdown)
+	{	
+		if (swap)
+		{	
+			if (list->index == swap->index - 1 - loop_size)
+				loop_size++;
+			else if (setswap)
+				swap->swap = 1;
+			countdown--;
+			swap = swap->next;
+		}
+		else
+			swap = start;
+	}
+	printf("------------return= %d\n", loop_size);
+	return (loop_size);
+}		
+
+void	swap_to_b(t_list list, t_list best,int loop)
+{
+	int	swap;
+	t_list start;
+
+	start = list;
+	swap = 0;
+	while (list)
+	{
+		ft_sa_sb();
+		swap = find_loop(start, best);
+		if (swap > loop)
+		{
+			loop = swap;
+			add_sa();
+		}
+		else
+			ft_sa_sb();
+		if(list->swap)
+			ft_pa();
+		else if (!list->swap)
+			ft_ra_rb();
+		list = list->next;
+	}
+}
+
+
+
+/*while (countdown - 1)
+		{	
+			if (swap)
+			{	
+				if (list->index == swap->index - 1 - loop_size)
+				{
+					printf("swap= %d index= %d so ++++++\n", *(int*)swap->nbr, swap->index);
+					loop_size++;
+				}
+				else
+					printf("nop swap = %d index = %d\n", *(int*)swap->nbr, swap->index);
+				countdown--;
+				swap = swap->next;
+			}
+			else
+				swap = start;
+		}*/
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