diff --git a/.gitignore b/.gitignore
index 3a271bd..a301abd 100644
--- a/.gitignore
+++ b/.gitignore
@@ -59,6 +59,7 @@ dkms.conf
 
 # Executable
 push_swap
+checker
 
 # File obj
 obj/
diff --git a/Makefile b/Makefile
index 4929b90..dded088 100644
--- a/Makefile
+++ b/Makefile
@@ -18,7 +18,7 @@ COMPLEX_DIR = radix
 
 FLAGS_DIR = flags
 
-CHECKER_DIR = checker
+CHECKER_DIR = check_error
 
 INCLUDES = includes
 
@@ -32,7 +32,7 @@ INSERTION = insertion.c
 
 FLAGS_FILES = algorithms_sort.c flag.c bench.c
 
-PARSING = ft_atoi.c parsing.c ft_strncmp.c ft_split.c ft_strlen.c ft_substr.c checker.c ft_itoa.c ft_isdigit.c \
+PARSING = ft_atoi.c parsing.c ft_strncmp.c ft_split.c ft_strlen.c ft_substr.c ft_itoa.c ft_isdigit.c \
 			ft_strjoin.c ft_strlcat.c ft_strlcpy.c parsing_2.c disorder.c
 
 CHECKER_FILES = check_error.c verif_flag.c verif_is_digit.c verif_overflow.c verif_double.c
@@ -65,7 +65,33 @@ NAME = push_swap
 OBJ = $(addprefix $(OBJ_DIR)/, $(notdir $(ALL_FILES:.c=.o)))
 DEP = $(OBJ:.o=.d)
 
-.PHONY: all clean fclean re
+#============================
+# BONUS CONFIG
+#============================
+
+BONUS_DIR = bonus
+
+GNL_D = GNL
+
+GNL_DIR = bonus/GNL
+
+BONUS_FILES = checker_bonus.c
+
+GNL_FILES = get_next_line.c get_next_line_utils.c
+
+SRC_FOR_BONUS = ft_putnbr.c secure_write.c
+
+ALL_BONUS_FILES = $(SRC_FOR_BONUS) $(BONUS_DIR)/$(BONUS_FILES) $(BONUS_DIR)/$(GNL_D)/$(GNL_FILES) \
+					$(STACK_UTILS_DIR)/$(STACK_UTILS)  $(PARS_DIR)/$(PARSING) \
+					$(ALGO_DIR)/$(MEDIUM_DIR)/$(MEDIUM_ALGO) $(ALGO_UTILS_DIR)/$(ALGO_UTILS) \
+					$(INSERT_DIR)/$(INSERTION) $(ALGO_DIR)/$(COMPLEX_DIR)/$(COMPLEX_ALGO) \
+					$(FLAGS_DIR)/$(FLAGS_FILES) $(CHECKER_DIR)/$(CHECKER_FILES)
+
+BONUS_OBJ = $(addprefix $(OBJ_DIR)/, $(notdir $(ALL_BONUS_FILES:.c=.o)))
+
+NAME_BONUS = checker
+
+.PHONY: all clean fclean re bonus
 
 all: $(NAME)
 
@@ -75,6 +101,12 @@ $(NAME): $(OBJ)
 	@echo "======= PUSH SWAP COMPILED ========="
 	@echo "===================================="
 
+$(NAME_BONUS): $(BONUS_OBJ)
+	@$(CC) $(CFLAGS) $(BONUS_OBJ) -o $(NAME_BONUS)
+	@echo "===================================="
+	@echo "======= PUSH SWAP COMPILED ========="
+	@echo "===================================="
+
 $(OBJ_DIR)/%.o: $(PARS_DIR)/%.c | $(OBJ_DIR)
 	$(CC) $(CFLAGS) -MMD -MP -c $< -o $@
 
@@ -102,9 +134,18 @@ $(OBJ_DIR)/%.o: $(FLAGS_DIR)/%.c | $(OBJ_DIR)
 $(OBJ_DIR)/%.o: $(CHECKER_DIR)/%.c | $(OBJ_DIR)
 	$(CC) $(CFLAGS) -MMD -MP -c $< -o $@
 
+$(OBJ_DIR)/%.o: $(BONUS_DIR)/%.c | $(OBJ_DIR)
+	$(CC) $(CFLAGS) -MMD -MP -c $< -o $@
+
+$(OBJ_DIR)/%.o: $(BONUS_DIR)/$(GNL_D)/%.c | $(OBJ_DIR)
+	$(CC) $(CFLAGS) -MMD -MP -c $< -o $@
+
 $(OBJ_DIR)/%.o: %.c | $(OBJ_DIR)
 	$(CC) $(CFLAGS) -MMD -MP -c $< -o $@
 
+$(OBJ_DIR_BONUS)/%.o: %.c | $(OBJ_DIR_BONUS)
+	$(CC) $(CFLAGS) -MMD -MP -c $< -o $@
+
 $(OBJ_DIR):
 	@mkdir -p $(OBJ_DIR)
 
@@ -116,9 +157,12 @@ clean:
 
 fclean: clean
 	@rm -f $(NAME)
+	@rm -f $(NAME_BONUS)
 	@echo "========== EXEC DELETED ============"
 	@echo "===================================="
 
 re: fclean all
 
+bonus: $(NAME_BONUS)
+
 -include $(DEP)
diff --git a/bonus/GNL/get_next_line.c b/bonus/GNL/get_next_line.c
new file mode 100644
index 0000000..402c49d
--- /dev/null
+++ b/bonus/GNL/get_next_line.c
@@ -0,0 +1,112 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   get_next_line.c                                    :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: dgaillet <dgaillet@student.42.fr>          +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2025/11/21 17:20:41 by dgaillet          #+#    #+#             */
+/*   Updated: 2025/11/28 13:47:15 by dgaillet         ###   ########lyon.fr   */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "get_next_line.h"
+#include "parsing.h"
+#include <unistd.h>
+
+static int	del_before_nl(char buf[BUFFER_SIZE])
+{
+	int		nl_i;
+	int		i;
+	char	*temp;
+
+	nl_i = index_of_nl(buf, BUFFER_SIZE);
+	if (nl_i >= 0)
+	{
+		temp = ft_substr_gnl(buf, nl_i + 1, BUFFER_SIZE - nl_i);
+		if (!temp)
+			return (-1);
+		ft_bzero(buf, BUFFER_SIZE);
+		i = 0;
+		while (temp[i])
+		{
+			buf[i] = temp[i];
+			i++;
+		}
+		free(temp);
+	}
+	return (1);
+}
+
+static char	*ft_read_one(char buf[BUFFER_SIZE], int fd, char *str)
+{
+	int	temp;
+
+	str = ft_strjoin_new(str, buf, BUFFER_SIZE);
+	if (!str)
+		return (NULL);
+	ft_bzero(buf, BUFFER_SIZE);
+	temp = read(fd, buf, BUFFER_SIZE);
+	if (temp < 0)
+	{
+		free(str);
+		return (NULL);
+	}
+	if ((!str || ft_strlen_1(str) == 0) && temp == 0)
+	{
+		free(str);
+		return (NULL);
+	}
+	if (temp == 0)
+		return (str);
+	return (str);
+}
+
+static char	*extract_all_nl(char buf[BUFFER_SIZE], int fd, char *str, int nl_i)
+{
+	int	temp;
+
+	if (!str)
+		return (NULL);
+	while (nl_i < 0)
+	{
+		str = ft_read_one(buf, fd, str);
+		if (!str)
+			return (NULL);
+		nl_i = index_of_nl(buf, BUFFER_SIZE);
+		if (nl_i < 0 && !ft_strlen_1(buf))
+			return (str);
+	}
+	str = ft_strjoin_new(str, buf, nl_i);
+	if (!str)
+		return (NULL);
+	temp = del_before_nl(buf);
+	if (temp < 0)
+	{
+		free(str);
+		return (NULL);
+	}
+	return (str);
+}
+
+char	*get_next_line(int fd)
+{
+	static char	buf[BUFFER_SIZE + 1];
+	int			nl_i;
+	int			temp;
+	char		*str;
+
+	if (fd < 0 || BUFFER_SIZE <= 0)
+		return (NULL);
+	nl_i = index_of_nl(buf, BUFFER_SIZE);
+	if (nl_i >= 0)
+	{
+		str = ft_substr_gnl(buf, 0, nl_i + 1);
+		temp = del_before_nl(buf);
+		if (temp < 0)
+			return (free(str), NULL);
+	}
+	else
+		str = extract_all_nl(buf, fd, ft_substr_gnl("", 0, 1), nl_i);
+	return (str);
+}
diff --git a/bonus/GNL/get_next_line_utils.c b/bonus/GNL/get_next_line_utils.c
new file mode 100644
index 0000000..0dc960e
--- /dev/null
+++ b/bonus/GNL/get_next_line_utils.c
@@ -0,0 +1,102 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   get_next_line_utils.c                              :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: dgaillet <dgaillet@student.42.fr>          +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2025/11/21 17:21:38 by dgaillet          #+#    #+#             */
+/*   Updated: 2025/11/27 18:06:51 by dgaillet         ###   ########lyon.fr   */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "get_next_line.h"
+#include <stdint.h>
+
+int	index_of_nl(char *str, int limit)
+{
+	int	i;
+
+	if (!str)
+		return (-1);
+	i = 0;
+	while (i < limit && str[i])
+	{
+		if (str[i] == '\n')
+			return (i);
+		i++;
+	}
+	return (-1);
+}
+
+size_t	ft_strlen_1(const char *s)
+{
+	size_t	i;
+
+	i = 0;
+	while (s[i])
+		i++;
+	return (i);
+}
+
+char	*ft_strjoin_new(char const *s1, char const *s2, size_t limit)
+{
+	char	*str;
+	size_t	i;
+	size_t	j;
+
+	str = malloc(sizeof(char) * (ft_strlen_1(s1) + ft_strlen_1(s2) + 1));
+	if (!str)
+		return (NULL);
+	i = 0;
+	j = 0;
+	while (s1[i])
+	{
+		str[i] = s1[i];
+		i++;
+	}
+	while (j <= limit && s2[j])
+	{
+		str[i + j] = s2[j];
+		j++;
+	}
+	str[i + j] = '\0';
+	free((void *) s1);
+	return (str);
+}
+
+char	*ft_substr_gnl(char const *s, unsigned int start, size_t len)
+{
+	size_t	i;
+	char	*sub_str;
+	size_t	s_len;
+
+	if (!s)
+		return (NULL);
+	s_len = ft_strlen_1(s);
+	if (start > s_len)
+		len = 0;
+	else if (s_len < (start + len))
+		len = s_len - start;
+	sub_str = malloc(sizeof(char) * (len + 1));
+	if (!sub_str)
+		return (NULL);
+	i = 0;
+	while (i < len)
+	{
+		sub_str[i] = s[start + i];
+		i++;
+	}
+	sub_str[i] = '\0';
+	return (sub_str);
+}
+
+void	ft_bzero(void *s, size_t n)
+{
+	while (n > 0)
+	{
+		*((unsigned char *) s) = '\0';
+		s++;
+		n--;
+	}
+}
diff --git a/bonus/checker_bonus.c b/bonus/checker_bonus.c
new file mode 100644
index 0000000..67b54a6
--- /dev/null
+++ b/bonus/checker_bonus.c
@@ -0,0 +1,104 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   checker_bonus.c                                    :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: dgaillet <dgaillet@student.42.fr>          +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2026/01/09 11:46:36 by dgaillet          #+#    #+#             */
+/*   Updated: 2026/01/09 14:51:32 by dgaillet         ###   ########lyon.fr   */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "push_swap.h"
+#include "parsing.h"
+#include "get_next_line.h"
+#include "check_error.h"
+#include <unistd.h>
+
+static int	apply_operation(t_stacks *stacks, char buf[1024])
+{
+	if (!ft_strncmp("sa", buf, ft_strlen(buf)))
+		return (sa(stacks), 1);
+	if (!ft_strncmp("sb", buf, ft_strlen(buf)))
+		return (sb(stacks), 1);
+	if (!ft_strncmp("ss", buf, ft_strlen(buf)))
+		return (ss(stacks), 1);
+	if (!ft_strncmp("pa", buf, ft_strlen(buf)))
+		return (pa(stacks), 1);
+	if (!ft_strncmp("pb", buf, ft_strlen(buf)))
+		return (pb(stacks), 1);
+	if (!ft_strncmp("ra", buf, ft_strlen(buf)))
+		return (ra(stacks), 1);
+	if (!ft_strncmp("rb", buf, ft_strlen(buf)))
+		return (rb(stacks), 1);
+	if (!ft_strncmp("rr", buf, ft_strlen(buf)))
+		return (rr(stacks), 1);
+	if (!ft_strncmp("rra", buf, ft_strlen(buf)))
+		return (rra(stacks), 1);
+	if (!ft_strncmp("rrb", buf, ft_strlen(buf)))
+		return (rrb(stacks), 1);
+	if (!ft_strncmp("rrr", buf, ft_strlen(buf)))
+		return (rrr(stacks), 1);
+	return (0);
+}
+
+static int	is_stacks_b_empty(t_stacks *stacks)
+{
+	if (stacks->b != NULL)
+		return (0);
+	return (1);
+}
+
+static int	tester(t_stacks *stacks)
+{
+	char	*buf;
+
+	buf = get_next_line(0);
+	while (buf)
+	{
+		if (!apply_operation(stacks, buf))
+			break ;
+		free(buf);
+		buf = get_next_line(0);
+	}
+	if (!is_stacks_b_empty(stacks))
+		return (write(1, "KO\n", 3));
+	if (!check_order(stacks->a))
+		return (write(1, "KO\n", 3));
+	write(1, "OK\n", 3);
+	return (0);
+}
+
+static int	bonus(char **tab)
+{
+	t_stacks	*stacks;
+	int			len;
+
+	stacks = NULL;
+	len = len_split(tab);
+	stacks = init_stacks(len, tab, 0);
+	stacks->print = 0;
+	if (!stacks)
+		return (0);
+	tester(stacks);
+	free_all(stacks);
+	return (1);
+}
+
+int	main(int argc, char **argv)
+{
+	char		**tab;
+
+	if (argc < 2)
+		return (write(2, "Error\n", 7));
+	tab = split_all(join_all(argc, argv));
+	if (!tab)
+		return (0);
+	if (!check_error_bonus(tab))
+		write(2, "Error\n", 7);
+	else
+		bonus(tab);
+	free_tab(tab);
+	return (0);
+}
diff --git a/checker/check_error.c b/check_error/check_error.c
similarity index 88%
rename from checker/check_error.c
rename to check_error/check_error.c
index c936923..05a01e0 100644
--- a/checker/check_error.c
+++ b/check_error/check_error.c
@@ -23,6 +23,17 @@ int	verif_is_number(char **tab)
 	return (1);
 }
 
+int	check_error_bonus(char **tab)
+{
+	if (!verif_is_digit(tab, 0))
+		return (0);
+	if (!verif_overflow(tab, 0))
+		return (0);
+	if (!verif_double(tab, 0))
+		return (0);
+	return (1);
+}
+
 int	check_error(char **tab, int mod)
 {
 	if (!verif_flag(tab, mod))
diff --git a/checker/verif_double.c b/check_error/verif_double.c
similarity index 100%
rename from checker/verif_double.c
rename to check_error/verif_double.c
diff --git a/checker/verif_flag.c b/check_error/verif_flag.c
similarity index 100%
rename from checker/verif_flag.c
rename to check_error/verif_flag.c
diff --git a/checker/verif_is_digit.c b/check_error/verif_is_digit.c
similarity index 100%
rename from checker/verif_is_digit.c
rename to check_error/verif_is_digit.c
diff --git a/checker/verif_overflow.c b/check_error/verif_overflow.c
similarity index 100%
rename from checker/verif_overflow.c
rename to check_error/verif_overflow.c
diff --git a/includes/check_error.h b/includes/check_error.h
index b6f64f1..261622c 100644
--- a/includes/check_error.h
+++ b/includes/check_error.h
@@ -19,5 +19,6 @@ int	verif_is_digit(char **tab, int mod);
 int	verif_overflow(char **tab, int mod);
 int	verif_double(char **tab, int mod);
 int	scan_str_is_digit(char *tab);
+int	check_error_bonus(char **tab);
 
 #endif
diff --git a/includes/get_next_line.h b/includes/get_next_line.h
new file mode 100644
index 0000000..81a7e8f
--- /dev/null
+++ b/includes/get_next_line.h
@@ -0,0 +1,30 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   get_next_line.h                                    :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: dgaillet <dgaillet@student.42.fr>          +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2025/11/21 17:22:03 by dgaillet          #+#    #+#             */
+/*   Updated: 2025/11/27 18:05:13 by dgaillet         ###   ########lyon.fr   */
+/*                                                                            */
+/* ************************************************************************** */
+
+#ifndef GET_NEXT_LINE_H
+# define GET_NEXT_LINE_H
+
+# ifndef BUFFER_SIZE
+#  define BUFFER_SIZE 42
+# endif
+
+# include <stdlib.h>
+
+char	*get_next_line(int fd);
+
+size_t	ft_strlen_1(const char *s);
+char	*ft_strjoin_new(char const *s1, char const *s2, size_t limit);
+void	ft_bzero(void *s, size_t n);
+int		index_of_nl(char *str, int limit);
+char	*ft_substr_gnl(char const *s, unsigned int start, size_t len);
+
+#endif
diff --git a/includes/push_swap.h b/includes/push_swap.h
index 0631636..9105eb4 100644
--- a/includes/push_swap.h
+++ b/includes/push_swap.h
@@ -26,6 +26,7 @@ typedef struct s_stacks
 	t_stack			*b;
 	int				algo;
 	int				bench;
+	int				print;
 	float			disorder;
 	unsigned int	ra;
 	unsigned int	rb;
diff --git a/parsing/parsing.c b/parsing/parsing.c
index 64f2edd..68ddb8c 100644
--- a/parsing/parsing.c
+++ b/parsing/parsing.c
@@ -51,6 +51,7 @@ static void	set_t_stacks(t_stacks *stacks)
 	stacks->algo = 0;
 	stacks->bench = 0;
 	stacks->disorder = 0;
+	stacks->print = 1;
 	stacks->sa = 0;
 	stacks->sb = 0;
 	stacks->ss = 0;
diff --git a/stack_utils/push.c b/stack_utils/push.c
index 63636e9..763cd72 100644
--- a/stack_utils/push.c
+++ b/stack_utils/push.c
@@ -31,7 +31,8 @@ void	pa(t_stacks *stacks)
 	}
 	stack_add_front(&(stacks->a), b_push);
 	stacks->pa++;
-	write(1, "pa\n", 3);
+	if (stacks->print)
+		write(1, "pa\n", 3);
 }
 
 void	pb(t_stacks *stacks)
@@ -51,5 +52,6 @@ void	pb(t_stacks *stacks)
 	}
 	stack_add_front(&(stacks->b), a_push);
 	stacks->pb++;
-	write(1, "pb\n", 3);
+	if (stacks->print)
+		write(1, "pb\n", 3);
 }
diff --git a/stack_utils/rev_rotate.c b/stack_utils/rev_rotate.c
index e575827..135bf22 100644
--- a/stack_utils/rev_rotate.c
+++ b/stack_utils/rev_rotate.c
@@ -26,7 +26,8 @@ void	rrb(t_stacks *stacks)
 	if (stacks && stacks->b && stacks->b->previous)
 		stacks->b = stacks->b->previous;
 	stacks->rrb++;
-	write(1, "rrb\n", 4);
+	if (stacks->print)
+		write(1, "rrb\n", 4);
 }
 
 void	rrr(t_stacks *stacks)
@@ -36,5 +37,6 @@ void	rrr(t_stacks *stacks)
 	if (stacks && stacks->a && stacks->a->previous)
 		stacks->a = stacks->a->previous;
 	stacks->rrr++;
-	write(1, "rrr\n", 4);
+	if (stacks->print)
+		write(1, "rrr\n", 4);
 }
diff --git a/stack_utils/rotate.c b/stack_utils/rotate.c
index 26d0896..922a56c 100644
--- a/stack_utils/rotate.c
+++ b/stack_utils/rotate.c
@@ -18,7 +18,8 @@ void	ra(t_stacks *stacks)
 	if (stacks && stacks->a && stacks->a->next)
 		stacks->a = stacks->a->next;
 	stacks->ra++;
-	write(1, "ra\n", 3);
+	if (stacks->print)
+		write(1, "ra\n", 3);
 }
 
 void	rb(t_stacks *stacks)
@@ -26,7 +27,8 @@ void	rb(t_stacks *stacks)
 	if (stacks && stacks->b && stacks->b->next)
 		stacks->b = stacks->b->next;
 	stacks->rb++;
-	write(1, "rb\n", 3);
+	if (stacks->print)
+		write(1, "rb\n", 3);
 }
 
 void	rr(t_stacks *stacks)
@@ -36,5 +38,6 @@ void	rr(t_stacks *stacks)
 	if (stacks && stacks->b && stacks->b->next)
 		stacks->b = stacks->b->next;
 	stacks->rr++;
-	write(1, "rr\n", 3);
+	if (stacks->print)
+		write(1, "rr\n", 3);
 }
diff --git a/stack_utils/swap.c b/stack_utils/swap.c
index e32e4e3..c37c468 100644
--- a/stack_utils/swap.c
+++ b/stack_utils/swap.c
@@ -25,7 +25,8 @@ void	sa(t_stacks *stacks)
 	a->value = a->next->value;
 	a->next->value = stock;
 	stacks->sa++;
-	write(1, "sa\n", 3);
+	if (stacks->print)
+		write(1, "sa\n", 3);
 }
 
 void	sb(t_stacks *stacks)
@@ -40,7 +41,8 @@ void	sb(t_stacks *stacks)
 	b->value = b->next->value;
 	b->next->value = stock;
 	stacks->sb++;
-	write(1, "sb\n", 3);
+	if (stacks->print)
+		write(1, "sb\n", 3);
 }
 
 void	ss(t_stacks *stacks)
@@ -66,5 +68,6 @@ void	ss(t_stacks *stacks)
 		a->next->value = stock;
 	}
 	stacks->ss++;
-	write(1, "ss\n", 3);
+	if (stacks->print)
+		write(1, "ss\n", 3);
 }