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