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day 12 part 1

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tomoron
2024-12-12 13:37:56 +01:00
parent 3e998c4f9b
commit db1eb6c158
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* part1.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: tomoron <tomoron@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2024/07/17 23:03:36 by tomoron #+# #+# */
/* Updated: 2024/12/12 13:32:35 by tomoron ### ########.fr */
/* */
/* ************************************************************************** */
#include <stdio.h>
#include <stdlib.h>
#include <strings.h>
#include "libft/libft.h"
char **create_locations(char **map)
{
int width;
int height;
char **res;
int i;
height = 0;
while(map[height])
height++;
width = 0;
while(map[0][width])
width++;
res = malloc((height + 1) * sizeof(char *));
res[height] = 0;
i = 0;
while(i < height)
{
res[i] = malloc(width + 1);
bzero(res[i], width + 1);
i++;
}
return(res);
}
int get_area_perimetter(char **map, int pos[2], int perimetter, char **locations, char c)
{
int res;
if(perimetter && pos[0] >= 0 && pos[1] >= 0 && map[pos[0]] && map[pos[0]][pos[1]] && locations[pos[0]][pos[1]])
return(0);
if(pos[0] < 0 || pos[1] < 0 || !map[pos[0]] || map[pos[0]][pos[1]] != c)
return(perimetter != 0);
res = 0;
res += !perimetter && c == map[pos[0]][pos[1]];
if(perimetter)
locations[pos[0]][pos[1]] = 1;
else
map[pos[0]][pos[1]] = '.';
res += get_area_perimetter(map, (int [2]){pos[0] - 1, pos[1]}, perimetter, locations, c);
res += get_area_perimetter(map, (int [2]){pos[0] + 1, pos[1]}, perimetter, locations, c);
res += get_area_perimetter(map, (int [2]){pos[0], pos[1] - 1}, perimetter, locations, c);
res += get_area_perimetter(map, (int [2]){pos[0], pos[1] + 1}, perimetter, locations, c);
return(res);
}
long int calc_price(char **map, int x, int y)
{
int area;
int perimetter;
char **locations;
locations = create_locations(map);
perimetter = get_area_perimetter(map, (int [2]){y, x}, 1, locations, map[y][x]);
area = get_area_perimetter(map,(int [2]){y, x}, 0, locations, map[y][x]);
ft_free_str_arr(locations);
return(area * perimetter);
}
long int resolve_part1(char *input, char **split)
{
(void)input;
int i;
int j;
long int res;
i = 0;
res = 0;
while(split[i])
{
j = 0;
while(split[i][j])
{
if(split[i][j] != '.')
res += calc_price(split, j, i);
j++;
}
i++;
}
return(res);
}