diff --git a/Makefile b/Makefile
index ca342cd..686b455 100644
--- a/Makefile
+++ b/Makefile
@@ -22,6 +22,7 @@ LIBS	=	$(_LIBS:lib%.a=%)
 SRCS	=	pushswap.c \
 			algo.c \
 			print.c \
+			swap.c \
 			stop.c
 
 ODIR	=	./builds
diff --git a/builds/algo.o b/builds/algo.o
index 106a6d4..69b77a3 100644
Binary files a/builds/algo.o and b/builds/algo.o differ
diff --git a/builds/print.o b/builds/print.o
index 5e01507..6b69c9a 100644
Binary files a/builds/print.o and b/builds/print.o differ
diff --git a/builds/pushswap.o b/builds/pushswap.o
index e4811c0..4817c02 100644
Binary files a/builds/pushswap.o and b/builds/pushswap.o differ
diff --git a/builds/swap.o b/builds/swap.o
new file mode 100644
index 0000000..d346899
Binary files /dev/null and b/builds/swap.o differ
diff --git a/includes/pushswap.h b/includes/pushswap.h
index ab00aef..6e35209 100644
--- a/includes/pushswap.h
+++ b/includes/pushswap.h
@@ -28,23 +28,21 @@ void		ps_stop(t_stack *stb, t_stack *sta, t_list *lst, int i);
 /*
 ** algo.c
 */
-t_list		*sort_algo(t_stack *stack);
+t_list		*sort_algo(t_stack *stack, int i);
 
 /*
 ** print.c
 */
-void		print_stack(t_stack *stack);
+void		print_result(t_list *result);
+void		print_stack(t_stack *stack, char c);
 
 
 /*
 ** swap
 */
-/*
-int		swap(t_list **list);
-void	sa();
-void	sb();
-void	ss();
-*/
+void	sa(t_list *pack);
+void	sb(t_list *pack);
+void	ss(t_list *pack);
 
 /*
 ** push
@@ -53,7 +51,6 @@ void	ss();
 int		push(t_list **dst, t_list **src);
 int		pa();
 int		pb();
-int		pp();
 */
 
 /*
diff --git a/pushswap b/pushswap
index 97457b7..86a1ee2 100755
Binary files a/pushswap and b/pushswap differ
diff --git a/srcs/algo.c b/srcs/algo.c
index 77a69c7..ba2468b 100644
--- a/srcs/algo.c
+++ b/srcs/algo.c
@@ -1,25 +1,9 @@
 
 #include "pushswap.h"
 
-void	sa(t_list *pack)
-{
-	t_stack		*stack_a;
-	t_list		**solution;
-	int	tmp;
-
-	stack_a = pack->content;
-	solution = pack->next->next->content;
-	if (!stack_a->next)
-		return ;
-	tmp = stack_a->n;
-	stack_a->n = stack_a->next->n;
-	stack_a->next->n = tmp;
-	(*solution)->content = ft_strdup("sa");
-	ft_lstadd_back(solution, ft_lstnew(NULL));
-}
-
 /*
-** this function 
+** this function is only used to print the stack and the action
+** then it launch the action (swap, push, rotate)
 */
 
 void	action(t_list *pack, void (*sp)(t_list *pack))
@@ -27,16 +11,38 @@ void	action(t_list *pack, void (*sp)(t_list *pack))
 	t_stack		*stack_a;
 	t_stack		*stack_b;
 	t_list		**solution;
+	int			flag;
 
 	stack_a = pack->content;
 	stack_b = pack->next->content;
 	solution = pack->next->next->content;
-	print_stack(stack_a);
-	print_stack(stack_b);
+	flag = *(int *)(pack->next->next->next->content); // this is a really ugly line :p it's because lst->content is a void*, but we need an int
+	if (!flag) // if flag == 0, don't print anything
+		return ;
+	if (!*solution) // to print only at first call
+	{
+		print_stack(stack_a, 'a');
+		print_stack(stack_b, 'b');
+	}
+	sp(pack); // the action to execute
 	ft_printf("%s\n", (*solution)->content);
-	sp(pack);
+	print_stack(stack_a, 'a');
+	print_stack(stack_b, 'b');
 }
 
+t_list	*do_pack(t_stack *stack_a, int flag)
+{
+	t_stack		*stack_b;
+	t_list		*pack;
+
+	if(!(stack_b = ft_calloc(1, sizeof(t_stack))))
+		ps_stop(stack_a, stack_b, NULL, 2);
+	pack = ft_lstnew(stack_a);
+	ft_lstadd_back(&pack, ft_lstnew(stack_b));
+	ft_lstadd_back(&pack, ft_lstnew(NULL));
+	ft_lstadd_back(&pack, ft_lstnew(&flag));
+	return (pack);
+}
 
 /*
 ** this function create the structures "solution" and "stack_b"
@@ -48,21 +54,13 @@ void	action(t_list *pack, void (*sp)(t_list *pack))
 ** then it calls the algorithm
 */
 
-t_list	*sort_algo(t_stack *stack_a)
+t_list	*sort_algo(t_stack *stack, int flag)
 {
-	t_stack		*stack_b;
-	t_list		*solution;
 	t_list		*pack;
 
-	solution = ft_lstnew(NULL);
-	if(!(stack_b = ft_calloc(1, sizeof(t_stack))))
-		ps_stop(stack_a, stack_b, solution, 2);
-	pack = ft_lstnew(stack_a);
-	ft_lstadd_back(&pack, ft_lstnew(stack_b));
-	ft_lstadd_back(&pack, ft_lstnew(&solution));
+	pack = do_pack(stack, flag);
+	action(pack, sa);
 	action(pack, sa);
-	print_stack(stack_a);
-	print_stack(stack_b);
 //	sa(stack_a, stack_b, &solution);
 //	sb(stack_a, stack_b, &solution);
 //	ss(stack_a, stack_b, &solution);
@@ -74,5 +72,8 @@ t_list	*sort_algo(t_stack *stack_a)
 //	rra(stack_a, stack_b, &solution);
 //	rrb(stack_a, stack_b, &solution);
 //	rrr(stack_a, stack_b, &solution);
-	return (solution);
+	if (flag)
+		ft_putchar('\n');
+	ps_stop(NULL, pack->next->content, NULL, -1); // pack->next->content is stack_b
+	return (pack->next->next->content); // pack->next->next->content is t_list *solution
 }
diff --git a/srcs/print.c b/srcs/print.c
index ee38810..5fa676c 100644
--- a/srcs/print.c
+++ b/srcs/print.c
@@ -1,16 +1,25 @@
 
 #include "pushswap.h"
 
-void	print_stack(t_stack *stack)
+void	print_result(t_list *result)
 {
-	ft_putstr("[");
+	while (result)
+	{
+		ft_printf("%s\n", result->content);
+		result = result->next;
+	}
+}
+
+void	print_stack(t_stack *stack, char c)
+{
+	ft_printf("    %c | ", c);
 	while (stack)
 	{
 		ft_printf("%i", stack->n);
 		stack = stack->next;
 		if (stack)
-			ft_putstr("; ");
+			ft_putstr(" ");
 	}
-	ft_putstr("]\n");
+	ft_putchar('\n');
 }
 
diff --git a/srcs/pushswap.c b/srcs/pushswap.c
index 2c37871..8eed16f 100644
--- a/srcs/pushswap.c
+++ b/srcs/pushswap.c
@@ -9,6 +9,15 @@ void	is_valid(int ac, char **av)
 	// check more error
 }
 
+int		check_flag(int *ac, char ***av)
+{
+	if (ft_strcmp((*av)[1], "-p") != 0)
+		return (0);
+	(*av)++;;
+	(*ac)--;
+	return (1);
+}
+
 t_stack	*init_stack(int ac, char **av)
 {
 	t_stack		*start;
@@ -30,11 +39,13 @@ int		main(int ac, char **av)
 {
 	t_stack		*stack;
 	t_list		*result;
+	int			flag;
 
 	is_valid(ac, av); // check if usage and list are correct
+	flag = check_flag(&ac, &av); //check for flag, like print
 	stack = init_stack(ac, av); // create the list from av[]
-	result = sort_algo(stack);
-	ft_printf("\n%s\n", result->content);
+	result = sort_algo(stack, flag);
+	print_result(result);
 	ps_stop(stack, NULL, result, 0);
 	return(0);
 }
diff --git a/srcs/swap.c b/srcs/swap.c
new file mode 100644
index 0000000..dded21e
--- /dev/null
+++ b/srcs/swap.c
@@ -0,0 +1,19 @@
+
+#include "pushswap.h"
+
+void	sa(t_list *pack)
+{
+	t_stack		*stack_a;
+//	t_list		**solution;
+	int	tmp;
+
+	stack_a = pack->content;
+//	solution = pack->next->next->content;
+	if (!stack_a->next)
+		return ;
+	tmp = stack_a->n;
+	stack_a->n = stack_a->next->n;
+	stack_a->next->n = tmp;
+//	ft_lstadd_back(solution, ft_lstnew(ft_strdup("sa")));
+}
+