add day 15

2024/15/part1.c

@@ -0,0 +1,136 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   part1.c                                            :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: tomoron <tomoron@student.42.fr>            +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/07/17 23:03:36 by tomoron           #+#    #+#             */
+/*   Updated: 2024/12/15 14:45:04 by tomoron          ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include "libft/libft.h"
+
+typedef struct s_robot
+{
+	int x;
+	int y;
+}	t_robot;
+
+static t_robot get_robot(char **map)
+{
+	int i;
+	int j;
+
+	i = 0;
+	while(map[i])
+	{
+		j = 0;
+		while(map[i][j])
+		{
+			if(map[i][j] == '@')	
+			{
+				map[i][j] = '.';	
+				return((t_robot){j, i});
+			}
+			j++;
+		}
+		i++;
+	}
+	return((t_robot){0, 0});
+}
+
+static void try_move(char **map, int dir[2], t_robot *robot)
+{
+	int i;
+	int j;
+
+	i = robot->y + dir[0];
+	j = robot->x + dir[1];
+	while(map[i][j] == 'O')
+	{
+		i += dir[0];	
+		j += dir[1];
+	}
+	if(map[i][j] == '#')
+		return;
+	robot->y += dir[0];
+	robot->x += dir[1];
+	if(map[robot->y][robot->x] == 'O')
+	{
+		map[robot->y][robot->x] = '.';
+		map[i][j] = 'O';
+	}
+}
+
+static long int calc_score(char **map)
+{
+	int i;
+	int j;
+	long int res;
+
+	i = 0;
+	res = 0;
+	while(map[i][0] == '#')
+	{
+		j = 0;
+		while(map[i][j])
+		{
+			if(map[i][j] == 'O')
+				res += (100 * i) + j;
+			j++;	
+		}
+		i++;
+	}
+	return(res);
+}
+
+static void exec_line(char **map, char *line, t_robot *robot)
+{
+	int dirs[4][2] = {{-1, 0}, {1, 0}, {0, -1}, {0, 1}};
+
+	int *dir;
+	while(*line)
+	{
+		switch(*line)
+		{
+			case '^':
+				dir = dirs[0];
+				break;
+			case 'v':
+				dir = dirs[1];
+				break;
+			case '<':
+				dir = dirs[2];
+				break;
+			default:
+				dir = dirs[3];
+				break;
+		}
+		try_move(map, dir, robot);
+		line++;
+	}
+}
+
+long int resolve_part1(char *input, char **split)
+{
+	(void)input;
+	long int res;
+	t_robot robot;	
+	char **instr;
+
+	instr = split;
+	while(**instr == '#')
+		instr++;
+	robot = get_robot(split);
+	while(*instr)
+	{
+		exec_line(split, *instr, &robot);
+		instr++;
+	}
+	res = calc_score(split);
+	return(res);
+}