diff --git a/2024/23/part1.c b/2024/23/part1.c
new file mode 100644
index 0000000..f4b2295
--- /dev/null
+++ b/2024/23/part1.c
@@ -0,0 +1,186 @@
+/* ************************************************ ************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   part1.c                                            :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   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       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#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;
+
+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_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);
+}
+
+int is_done(t_done *done, t_computer *c1, t_computer *c2, t_computer *c3)
+{
+	while(done)
+	{
+		if((done->lst[0] == c1 || done->lst[0] == c2 || done->lst[0] == c3) && (done->lst[1] == c1 || done->lst[1] == c2 || done->lst[1] == c3) && (done->lst[2] == c1 || done->lst[2] == c2 || done->lst[2] == c3))
+			return(1);
+		done = done->next;
+	}
+	return(0);
+}
+
+void add_done(t_done **done, t_computer *c1, t_computer *c2, t_computer *c3)
+{
+	t_done *new;
+
+	new = malloc(sizeof(t_done));
+	new->lst[0] = c1;
+	new->lst[1] = c2;
+	new->lst[2] = c3;
+	new->next = *done;
+	*done = new;
+}
+
+int get_res(t_computer *input)
+{
+	t_connected *tmp1;
+	t_connected *tmp2;
+	t_done *done;
+	int res;
+
+	res = 0;
+	done = 0;
+	while(input)
+	{
+		tmp1 = input->connected;
+		while(tmp1)
+		{
+			tmp2 = input->connected;
+			while(tmp2)
+			{
+				if(tmp1 != tmp2)
+				{
+					if(is_connected(tmp1->comp, tmp2->comp) && !is_done(done, input, tmp1->comp, tmp2->comp))
+					{
+						res += (*input->name == 't' || *tmp1->comp->name == 't' || *tmp2->comp->name == 't');
+						add_done(&done, input, tmp1->comp, tmp2->comp);
+					}
+				}
+				tmp2 = tmp2->next;
+			}
+			tmp1 = tmp1->next;
+		}
+		input = input->next;
+	}
+	return(res);
+}
+
+long int resolve_part1(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);
+}