diff --git a/2024/23/Makefile b/2024/23/Makefile
new file mode 100644
index 0000000..808a501
--- /dev/null
+++ b/2024/23/Makefile
@@ -0,0 +1,69 @@
+# **************************************************************************** #
+#                                                                              #
+#                                                         :::      ::::::::    #
+#    Makefile                                           :+:      :+:    :+:    #
+#                                                     +:+ +:+         +:+      #
+#    By: tomoron <tomoron@student.42.fr>            +#+  +:+       +#+         #
+#                                                 +#+#+#+#+#+   +#+            #
+#    Created: 2024/07/17 15:48:36 by tomoron           #+#    #+#              #
+#    Updated: 2024/10/29 20:43:12 by tomoron          ###   ########.fr        #
+#                                                                              #
+# **************************************************************************** #
+
+SRCS =	main.c\
+		part1.c\
+		part2.c
+
+OBJS = $(SRCS:.c=.o)
+
+FLAGS = -Wextra -Werror -Wall -g
+
+LIB = libft/libft.a
+
+all: $(LIB) a.out test
+	cp test cur_input
+	./a.out
+
+f: $(LIB) a.out input
+	cp input cur_input
+	./a.out
+
+test: 
+	touch test
+
+input:
+	touch input
+
+cp:
+	cp part1.c part2.c
+	sed -i 's/resolve_part1/resolve_part2/g' part2.c
+
+$(LIB): libft
+	make -C libft
+
+libft:
+	cp -r ~/Desktop/aoc/libft .
+
+main.c:
+	cp ~/Desktop/aoc/main.c .
+
+part1.c:
+	cp ~/Desktop/aoc/part1.c .
+
+part2.c:
+	cp ~/Desktop/aoc/part2.c .
+
+a.out: main.c $(OBJS) $(LIB)
+	clang $(FLAGS) $(OBJS) $(LIB)
+
+clean:
+	rm -rf $(OBJS)
+	rm -rf libft
+
+fclean: clean
+	rm -rf a.out
+
+.c.o:
+	clang $(FLAGS) -c $< -o $@
+
+.PHONY: t all clean fclean cp
diff --git a/2024/23/main.c b/2024/23/main.c
new file mode 100644
index 0000000..4f9b609
--- /dev/null
+++ b/2024/23/main.c
@@ -0,0 +1,67 @@
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include "libft/libft.h"
+
+long int resolve_part1(char *input, char **split);
+long int resolve_part2(char *input, char **split);
+
+char *get_input(char *file)
+{
+	int fd;
+	int rd_len;
+	char buffer[1000];
+	int len;
+	char *res;
+
+	fd = open(file, O_RDONLY);
+	len = 0;
+	if(fd < 0)
+		return(0);
+	rd_len = -1;
+	while(rd_len)
+	{
+		rd_len = read(fd, buffer, 1000);
+		len+= rd_len;
+	}
+	close(fd);
+	res = malloc(len + 1);
+	if(!res)
+		return(0);
+	fd = open(file, O_RDONLY);
+	if(fd < 0)
+		return(0);
+	rd_len = read(fd,res, len);
+	res[len] = 0;
+	close(fd);
+	return(res);
+}
+
+int main(void)
+{
+	char *input;
+	char *input_cpy;
+	char **split;
+
+	input = get_input("cur_input");
+	input_cpy = ft_strdup(input);
+	if(!input || !input_cpy)
+	{
+		fprintf(stderr, "file read error\n");
+		return(1);
+	}
+	split = ft_split(input, '\n');
+	if(!split)
+		return(1);
+	printf("result part 1: %ld\n", resolve_part1(input, split));
+	ft_free_str_arr(split);
+	split = ft_split(input_cpy, '\n');
+	if(!split)
+		return(1);
+	printf("result part 2: %ld\n", resolve_part2(input, split));
+	ft_free_str_arr(split);
+	free(input);
+	free(input_cpy);
+	return(0);
+}
diff --git a/2024/23/part1.c b/2024/23/part1.c
index f4b2295..60c359a 100644
--- a/2024/23/part1.c
+++ b/2024/23/part1.c
@@ -6,7 +6,7 @@
 /*   By: tomoron <tomoron@student.42.fr>            +#+  +:+       +#+        */
 /*                                                +#+#+#+#+#+   +#+           */
 /*   Created: 2024/07/17 23:03:36 by tomoron           #+#    #+#             */
-/*   Updated: 2024/12/23 22:26:48 by tomoron          ###   ########.fr       */
+/*   Updated: 2024/12/23 23:20:04 by tomoron          ###   ########.fr       */
 /*                                                                            */
 /* ************************************************************************** */
 
@@ -111,7 +111,7 @@ static int is_connected(t_computer *c1, t_computer *c2)
 	return(0);
 }
 
-int is_done(t_done *done, t_computer *c1, t_computer *c2, t_computer *c3)
+static int is_done(t_done *done, t_computer *c1, t_computer *c2, t_computer *c3)
 {
 	while(done)
 	{
@@ -122,7 +122,7 @@ int is_done(t_done *done, t_computer *c1, t_computer *c2, t_computer *c3)
 	return(0);
 }
 
-void add_done(t_done **done, t_computer *c1, t_computer *c2, t_computer *c3)
+static void add_done(t_done **done, t_computer *c1, t_computer *c2, t_computer *c3)
 {
 	t_done *new;
 
@@ -134,7 +134,7 @@ void add_done(t_done **done, t_computer *c1, t_computer *c2, t_computer *c3)
 	*done = new;
 }
 
-int get_res(t_computer *input)
+static int get_res(t_computer *input)
 {
 	t_connected *tmp1;
 	t_connected *tmp2;
diff --git a/2024/23/part2.c b/2024/23/part2.c
new file mode 100644
index 0000000..72361d1
--- /dev/null
+++ b/2024/23/part2.c
@@ -0,0 +1,257 @@
+/* ************************************************ ************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   part2.c                                            :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: tomoron <tomoron@student.42.fr>            +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/07/17 23:03:36 by tomoron           #+#    #+#             */
+/*   Updated: 2024/12/24 00:26:43 by tomoron          ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "libft/libft.h"
+
+typedef struct s_connected t_connected;
+
+typedef struct s_computer 
+{
+	t_connected *connected;
+	char name[3];
+	struct s_computer *next;	
+}	t_computer;
+
+typedef struct s_done
+{
+	t_computer *lst[3];
+	struct s_done *next;
+} t_done;
+
+typedef struct s_connected 
+{
+	t_computer *comp;
+	struct s_connected *next;
+
+} t_connected;
+
+typedef struct s_found
+{
+	t_computer *comp;
+	struct s_found *next;
+}	t_found;
+
+static t_computer *get_computer(t_computer *list, char *name)
+{
+	while(list)
+	{
+		if(!ft_strcmp(list->name, name))
+			return(list);
+		list = list->next;
+	}
+	return(0);
+}
+
+static void add_to_computer(t_computer **computers, char *computer, char *other)
+{
+	t_computer *tmp;
+	t_connected *new;
+
+	tmp = *computers;
+	while(tmp)
+	{
+		if(!ft_strcmp(tmp->name, computer))
+			break;
+		tmp = tmp->next;
+	}
+	if(!tmp)
+	{
+		tmp = malloc(sizeof(t_computer));
+		memcpy(tmp->name, computer, 3);
+		tmp->next = *computers;
+		tmp->connected = 0;
+		*computers = tmp;
+	}
+	new = malloc(sizeof(t_connected));
+	new->comp = get_computer(*computers, other);
+	new->next = tmp->connected;
+	tmp->connected = new;
+}
+
+static void parse_line(t_computer **list, char *line)
+{
+	char c1[3];
+	char c2[3];
+	c1[0] = line[0];
+	c1[1] = line[1];
+	c1[2] = 0;
+	c2[0] = line[3];
+	c2[1] = line[4];
+	c2[2] = 0;
+	add_to_computer(list, c1, c2);
+	add_to_computer(list, c2, c1);
+}
+
+static int is_in_found(t_found *found, t_computer *c)
+{
+	while(found)
+	{
+		if(found->comp == c)
+			return(1);
+		found = found->next;
+	}
+	return(0);
+}
+
+static void add_found(t_found **found, t_computer *c)
+{
+	t_found *new;
+
+	new = malloc(sizeof(t_found));
+	new->comp = c;
+	new->next = *found;
+	*found = new;
+}
+
+static int is_connected(t_computer *c1, t_computer *c2)
+{
+	t_connected *tmp;
+
+	if(!c1 || !c2)
+		return(0);
+	tmp = c1->connected;
+	while(tmp)
+	{
+		if(tmp->comp == c2)
+			return(1);
+		tmp = tmp->next;
+	}
+	tmp = c2->connected;
+	while(tmp)
+	{
+		if(tmp->comp == c1)
+			return(1);
+		tmp = tmp->next;
+	}
+	return(0);
+}
+
+static void find_connected(t_found **found,t_found **res, t_computer *comp)
+{
+	t_connected *lst;
+	t_found *tmp;
+
+	if(!comp || is_in_found(*found, comp))
+		return;
+	add_found(found, comp);
+	if(!*res)
+		add_found(res, comp);
+	tmp = *res;
+	while(tmp)
+	{
+		if(!is_connected(tmp->comp, comp))
+			break;
+		tmp = tmp->next;
+	}
+	if(!tmp)
+		add_found(res, comp);
+	lst = comp->connected;
+	while(lst)
+	{
+		find_connected(found,res, lst->comp);	
+		lst = lst->next;
+	}
+}
+
+static void sort_list(t_found *found)
+{
+	t_found *cur;
+	t_found *start;
+	char tmp;
+
+	start = found;
+	cur = found;
+	while(cur)
+	{
+		found = start;
+		while(found->next)
+		{
+			if(ft_strcmp(found->comp->name, found->next->comp->name) > 0)
+			{
+				tmp = found->comp->name[0];
+				found->comp->name[0] = found->next->comp->name[0];
+				found->next->comp->name[0] = tmp;
+				tmp = found->comp->name[1];
+				found->comp->name[1] = found->next->comp->name[1];
+				found->next->comp->name[1] = tmp;
+				tmp = found->comp->name[2];
+				found->comp->name[2] = found->next->comp->name[2];
+				found->next->comp->name[2] = tmp;
+			}
+			found = found->next;
+		}
+		cur = cur->next;	
+	}
+}
+
+static int get_res(t_computer *input)
+{
+	t_found *found;
+	t_found *res;
+	t_found *tmp;
+	int i;
+	int max_len;
+	
+	res = 0;
+	max_len = 0;
+	while(input)
+	{
+		found = 0;
+		tmp = 0;
+		find_connected(&tmp,&found, input);
+		i = 0;
+		tmp = found;
+		while(tmp)
+		{
+			tmp = tmp->next;
+			i++;
+		}
+		if(i > max_len)
+		{
+			max_len = i;
+			res = found;
+		}
+		input = input->next;
+	}
+	i = 0;
+	while(res)
+	{
+		sort_list(res);
+		printf("%s", res->comp->name);
+		if(res->next)
+			printf(",");
+		res = res->next;
+		i++;
+	}
+	printf("\n");
+	return(0);
+}
+
+long int resolve_part2(char *line, char **split)
+{
+	(void)line;
+	t_computer *input;
+	int res;
+
+	res = 0;
+	input = 0;
+	while(*split)
+	{
+		parse_line(&input, *split);
+		split++;
+	}
+	res = get_res(input);
+	return(res);
+}
diff --git a/2024/23/test b/2024/23/test
new file mode 100644
index 0000000..f52be44
--- /dev/null
+++ b/2024/23/test
@@ -0,0 +1,6 @@
+ka-co
+ta-co
+de-co
+ta-ka
+de-ta
+ka-de