From b4a67744e10a9af1699bf2908ff3f122a6549560 Mon Sep 17 00:00:00 2001 From: tomoron Date: Sun, 22 Dec 2024 20:20:32 +0100 Subject: [PATCH] add day 21 --- 2024/21/Makefile | 69 ++++++++++++++++ 2024/21/main.c | 67 ++++++++++++++++ 2024/21/part1.c | 205 +++++++++++++++++++++++++++++++++++++++++++++++ 2024/21/part2.c | 22 +++++ 2024/21/test | 5 ++ 5 files changed, 368 insertions(+) create mode 100644 2024/21/Makefile create mode 100644 2024/21/main.c create mode 100644 2024/21/part1.c create mode 100644 2024/21/part2.c create mode 100644 2024/21/test diff --git a/2024/21/Makefile b/2024/21/Makefile new file mode 100644 index 0000000..808a501 --- /dev/null +++ b/2024/21/Makefile @@ -0,0 +1,69 @@ +# **************************************************************************** # +# # +# ::: :::::::: # +# Makefile :+: :+: :+: # +# +:+ +:+ +:+ # +# By: tomoron +#+ +:+ +#+ # +# +#+#+#+#+#+ +#+ # +# 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/2024/21/main.c b/2024/21/main.c new file mode 100644 index 0000000..4f9b609 --- /dev/null +++ b/2024/21/main.c @@ -0,0 +1,67 @@ +#include +#include +#include +#include +#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/2024/21/part1.c b/2024/21/part1.c new file mode 100644 index 0000000..248e79f --- /dev/null +++ b/2024/21/part1.c @@ -0,0 +1,205 @@ +/* ************************************************************************** */ +/* */ +/* ::: :::::::: */ +/* part1.c :+: :+: :+: */ +/* +:+ +:+ +:+ */ +/* By: tomoron +#+ +:+ +#+ */ +/* +#+#+#+#+#+ +#+ */ +/* Created: 2024/07/17 23:03:36 by tomoron #+# #+# */ +/* Updated: 2024/12/22 20:19:21 by tomoron ### ########.fr */ +/* */ +/* ************************************************************************** */ + +#include +#include +#include +#include "libft/libft.h" + +typedef struct s_cache +{ + char *str; + int pos[2]; + int depth; + uint64_t res; + struct s_cache *next; +} t_cache; + +static void get_char_pos(char **map, char c, int *res) +{ + res[0] = 0; + while(map[res[0]]) + { + res[1] = 0; + while(map[res[0]][res[1]]) + { + if(map[res[0]][res[1]] == c) + return ; + res[1]++; + } + res[0]++; + } +} + +static void add_char(int nb, char c, char *res, int *i) +{ + if(nb < 0) + nb *= -1; + while(nb > 0) + { + res[(*i)++] = c; + nb--; + } + res[*i] = 0; +} + +int move_y(char **map, int diff[2], int from[2]) +{ + int diff_spc[2]; + int spc[2]; + + get_char_pos(map, ' ', spc); + diff_spc[0] = spc[0] - from[0]; + diff_spc[1] = spc[1] - from[1]; + return((diff[1] > 0 || (diff_spc[1] == diff[1] && diff_spc[0] == 0)) && (diff_spc[0] != diff[0] || diff_spc[1] != 0)); +} + +char *plan_route(char **map, int from[2], int to[2]) +{ + int diff[2]; + char chrs[2]; + char *res; + int i; + + res = malloc(128); + i = 0; + chrs[0] = 'v'; + chrs[1] = '>'; + diff[0] = to[0] - from[0]; + diff[1] = to[1] - from[1]; + if(diff[0] < 0) + chrs[0] = '^'; + if(diff[1] < 0) + chrs[1] = '<'; + if(move_y(map, diff, from)) + { + add_char(diff[0], chrs[0], res, &i); + add_char(diff[1], chrs[1], res, &i); + } + else + { + add_char(diff[1], chrs[1], res, &i); + add_char(diff[0], chrs[0], res, &i); + } + res[i] = 'A'; + res[i + 1] = 0; + return(res); +} + +uint64_t get_cache(t_cache *cache, char *str, int depth, int *pos) +{ + int i; + i = 0; + while(cache) + { + if(!ft_strcmp(cache->str, str) && cache->depth == depth && cache->pos[0] == pos[0] && cache->pos[1] == pos[1]) + { + printf("cache used\n"); + return(cache->res); + } + cache = cache->next; + i++; + } + printf("cache len : %d\n", i); + return(0); +} + +void add_cache(t_cache **cache, char *str, int depth, int *pos, uint64_t res) +{ + t_cache *new; + + new = malloc(sizeof(t_cache)); + new->str = ft_strdup(str); + new->depth = depth; + new->pos[0] = pos[0]; + new->pos[1] = pos[1]; + new->res = res; + new->next = *cache; + *cache = new; +} + +uint64_t get_path_len(char **keypad, char **robot_pad, int **pos, char *objectives, int depth) +{ + static t_cache *cache; + int cur_objective[2]; + char *path; + uint64_t res; + int i; + + res = get_cache(cache, objectives, depth, pos[depth]); + i = 0; + if(res) + return(res); + while(objectives[i]) + { + if(depth != 0) + keypad = robot_pad; + get_char_pos(keypad, objectives[i], cur_objective); + path = plan_route(keypad, pos[depth], cur_objective); + if(depth < 25) + res += get_path_len(keypad, robot_pad, pos, path, depth + 1); + else + res += ft_strlen(path); + free(path); + pos[depth][0] = cur_objective[0]; + pos[depth][1] = cur_objective[1]; + i++; + } + add_cache(&cache, objectives, depth, pos[depth], res); + return(res); +} + +int **init_positions(int nb) +{ + int **res; + int i; + + res = malloc((nb + 1) * sizeof(int *)); + res[nb] = 0; + i = 0; + while(i < nb) + { + res[i] = malloc(2 * sizeof(int)); + res[i][0] = 0; + res[i][1] = 2; + if(i == 0) + res[i][0] = 3; + i++; + } + return(res); +} + +uint64_t resolve_part1(char *input, char **split) +{ + (void)input; + (void)split; + int **pos; + uint64_t res; + char **keypad; + char **robot_pad; + + keypad = ft_split("789\n456\n123\n 0A", '\n'); + robot_pad = ft_split(" ^A\n", '\n'); + pos = init_positions(30); + res = 0; + while(*split) + { + printf("%s\n", *split); +// printf("%zu\n", get_path_len(keypad, robot_pad, pos, *split, 0)); + res += get_path_len(keypad, robot_pad, pos, *split, 0) * ft_atoi(*split); + split++; + } + ft_free_str_arr((void *)pos); + ft_free_str_arr(keypad); + ft_free_str_arr(robot_pad); + return(res); +} diff --git a/2024/21/part2.c b/2024/21/part2.c new file mode 100644 index 0000000..35dff46 --- /dev/null +++ b/2024/21/part2.c @@ -0,0 +1,22 @@ +/* ************************************************************************** */ +/* */ +/* ::: :::::::: */ +/* part2.c :+: :+: :+: */ +/* +:+ +:+ +:+ */ +/* By: tomoron +#+ +:+ +#+ */ +/* +#+#+#+#+#+ +#+ */ +/* Created: 2024/07/17 23:03:36 by tomoron #+# #+# */ +/* Updated: 2024/07/17 23:18:02 by tomoron ### ########.fr */ +/* */ +/* ************************************************************************** */ + +#include +#include +#include "libft/libft.h" + +long int resolve_part2(char *input, char **split) +{ + (void)input; + (void)split; + return(0); +} diff --git a/2024/21/test b/2024/21/test new file mode 100644 index 0000000..4cf0c29 --- /dev/null +++ b/2024/21/test @@ -0,0 +1,5 @@ +029A +980A +179A +456A +379A