add day 10

2024/10/Makefile

@@ -0,0 +1,69 @@
+# **************************************************************************** #
+#                                                                              #
+#                                                         :::      ::::::::    #
+#    Makefile                                           :+:      :+:    :+:    #
+#                                                     +:+ +:+         +:+      #
+#    By: tomoron <tomoron@student.42.fr>            +#+  +:+       +#+         #
+#                                                 +#+#+#+#+#+   +#+            #
+#    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

2024/10/main.c

@@ -0,0 +1,67 @@
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdio.h>
+#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);
+}

2024/10/part1.c

@@ -0,0 +1,101 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   part1.c                                            :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: tomoron <tomoron@student.42.fr>            +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/07/17 23:03:36 by tomoron           #+#    #+#             */
+/*   Updated: 2024/12/10 12:31:18 by tomoron          ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include "libft/libft.h"
+
+static long int find_trails(char **map, int pos[2], char **locations)
+{
+	char c;
+	long int res;
+
+	c = map[pos[0]][pos[1]];
+	res = 0;
+	if(c == '9' && !locations[pos[0]][pos[1]])
+	{
+		locations[pos[0]][pos[1]] = 1;
+		return(1);
+	}
+	if(map[pos[0] + 1] && map[pos[0] + 1][pos[1]] == c + 1)
+		res += find_trails(map, (int [2]){pos[0] + 1, pos[1]}, locations);
+	if(pos[0] - 1 >= 0 && map[pos[0] - 1][pos[1]] == c + 1)
+		res += find_trails(map, (int [2]){pos[0] - 1, pos[1]}, locations);
+	if(map[pos[0]][pos[1] + 1] && map[pos[0]][pos[1] + 1] == c + 1)
+		res += find_trails(map, (int [2]){pos[0], pos[1] + 1}, locations);
+	if(pos[1] - 1 >= 0 && map[pos[0]][pos[1] - 1] == c + 1)
+		res += find_trails(map, (int [2]){pos[0], pos[1] - 1}, locations);
+	return(res);	
+}
+
+static void reset_locations(char **locations, int height, int width)
+{
+	int i;
+
+	i = 0;
+	while(i < height)
+	{
+		ft_bzero(locations[i], width);
+		i++;
+	}
+}
+
+static char **create_map(char **split, int *height, int *width)
+{
+	char **res;
+
+	*height = 0;
+	*width = 0;
+	while(split[*height])
+		(*height)++;
+	while(split[0][*width])
+		(*width)++;
+	res = malloc(*height * sizeof(char *));
+	*height = 0;
+	while(split[*height])
+	{
+		res[*height] = malloc(*width);
+		(*height)++;
+	}
+	reset_locations(res, *height, *width);
+	return(res);
+}
+
+long int resolve_part1(char *input, char **split)
+{
+	(void)input;
+	int i;
+	int j;
+	long int res;
+	char **locations;
+	int height;
+	int width;
+
+	locations = create_map(split, &height, &width);
+	i = 0;
+	res = 0;
+	while(split[i])
+	{
+		j = 0;
+		while(split[i][j])
+		{
+			if(split[i][j] == '0')
+			{
+				reset_locations(locations, height, width);
+				res += find_trails(split, (int [2]){i, j}, locations);
+			}
+			j++;
+		}
+		i++;
+	}
+	return(res);
+}

2024/10/part2.c

@@ -0,0 +1,58 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   part2.c                                            :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: tomoron <tomoron@student.42.fr>            +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/07/17 23:03:36 by tomoron           #+#    #+#             */
+/*   Updated: 2024/12/10 12:32:48 by tomoron          ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include "libft/libft.h"
+
+static long int find_trails(char **map, int pos[2])
+{
+	char c;
+	long int res;
+
+	c = map[pos[0]][pos[1]];
+	res = 0;
+	if(c == '9')
+		return(1);
+	if(map[pos[0] + 1] && map[pos[0] + 1][pos[1]] == c + 1)
+		res += find_trails(map, (int [2]){pos[0] + 1, pos[1]});
+	if(pos[0] - 1 >= 0 && map[pos[0] - 1][pos[1]] == c + 1)
+		res += find_trails(map, (int [2]){pos[0] - 1, pos[1]});
+	if(map[pos[0]][pos[1] + 1] && map[pos[0]][pos[1] + 1] == c + 1)
+		res += find_trails(map, (int [2]){pos[0], pos[1] + 1});
+	if(pos[1] - 1 >= 0 && map[pos[0]][pos[1] - 1] == c + 1)
+		res += find_trails(map, (int [2]){pos[0], pos[1] - 1});
+	return(res);	
+}
+
+long int resolve_part2(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] == '0')
+				res += find_trails(split, (int [2]){i, j});
+			j++;
+		}
+		i++;
+	}
+	return(res);
+}

2024/10/test

@@ -0,0 +1,8 @@
+89010123
+78121874
+87430965
+96549874
+45678903
+32019012
+01329801
+10456732