add day 9

2024/9/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

2024/9/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);
+}

2024/9/part1.c

@@ -0,0 +1,98 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   part1.c                                            :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: tomoron <tomoron@student.42.fr>            +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/07/17 23:03:36 by tomoron           #+#    #+#             */
+/*   Updated: 2024/12/09 14:23:36 by tomoron          ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include "libft/libft.h"
+
+static void add_nbr(int **res, int nb, int index)
+{
+	int free_space;
+	 
+	free_space = index % 2;
+	if(index)
+		index /= 2;
+	while(nb > 0)
+	{
+		if(free_space)
+			**res = -1;
+		else
+			**res = index;
+		(*res)++;
+		nb--;
+	}
+}
+
+static int *get_nbrs(char *input, size_t *len)
+{
+	int i;
+	int *nbrs;
+	int *res;
+
+	*len = 0;
+	i = 0;
+	while(input[i] && ft_isdigit(input[i]))
+	{
+		*len += input[i] - '0';
+		i++;
+	}
+	res = malloc(*len * sizeof(int));
+	nbrs = res;
+	i = 0;
+	while(input[i])
+	{
+		add_nbr(&nbrs, input[i] - '0', i);
+		i++;
+	}
+	return(res);
+}
+
+static void frag_disk(int *disk, int len)
+{
+	int *fs_ptr;
+	int *end_ptr;	
+
+	fs_ptr = disk;
+	end_ptr = disk + (len - 1);
+	while(end_ptr != fs_ptr)
+	{
+		while(*fs_ptr != -1 && fs_ptr < end_ptr)
+			fs_ptr++;
+		while(*end_ptr == -1 && end_ptr > fs_ptr)
+			end_ptr--;
+		*fs_ptr = *end_ptr;	
+		*end_ptr = -1;
+	}
+}
+
+long int resolve_part1(char *input, char **split)
+{
+	(void)split;
+	int *disk;
+	size_t len;
+	size_t i;	
+	long int res;
+	disk = get_nbrs(input, &len);
+	frag_disk(disk, len);
+	res = 0;
+	i = 0;
+	while(i < len)
+	{
+		if(disk[i] != -1)
+			res += disk[i] * i;
+		i++;
+	}
+	free(disk);
+	return(res);
+}
+
+

2024/9/part2.c

@@ -0,0 +1,128 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   part2.c                                            :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: tomoron <tomoron@student.42.fr>            +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2024/07/17 23:03:36 by tomoron           #+#    #+#             */
+/*   Updated: 2024/12/09 14:24:07 by tomoron          ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include "libft/libft.h"
+
+static void add_nbr(int **res, int nb, int index)
+{
+	int free_space;
+	 
+	free_space = index % 2;
+	if(index)
+		index /= 2;
+	while(nb > 0)
+	{
+		if(free_space)
+			**res = -1;
+		else
+			**res = index;
+		(*res)++;
+		nb--;
+	}
+}
+
+static int *get_nbrs(char *input, size_t *len)
+{
+	int i;
+	int *nbrs;
+	int *res;
+
+	*len = 0;
+	i = 0;
+	while(input[i] && ft_isdigit(input[i]))
+	{
+		*len += input[i] - '0';
+		i++;
+	}
+	res = malloc(*len * sizeof(int));
+	nbrs = res;
+	i = 0;
+	while(input[i])
+	{
+		add_nbr(&nbrs, input[i] - '0', i);
+		i++;
+	}
+	return(res);
+}
+
+static int *find_place(int *disk, int bloc_len, int *end)
+{
+	int free_len;
+
+	while(disk < end)
+	{
+		free_len = 0;
+		while(*disk != -1 && disk < end)
+			disk++;
+		while(disk[free_len] == -1 && disk < end)
+			free_len++;
+		if(free_len >= bloc_len)
+			return(disk);
+		disk += free_len;
+	}
+	return(0);
+}
+
+static void frag_disk(int *disk, int len)
+{
+	int *fs_ptr;
+	int *end_ptr;	
+	int bloc_len;
+	int tmp;
+
+	fs_ptr = disk;
+	end_ptr = disk + (len - 1);
+	while(end_ptr > disk)
+	{
+		bloc_len = 0;
+		fs_ptr = disk;
+		while(*end_ptr == -1 && end_ptr > disk)
+			end_ptr--;
+		tmp = *end_ptr;
+		while(end_ptr[-bloc_len] == tmp && end_ptr > disk)
+			bloc_len++;
+		fs_ptr = find_place(disk, bloc_len, end_ptr);
+		while(fs_ptr && bloc_len > 0)
+		{
+			*fs_ptr = *end_ptr;
+			*end_ptr = -1;
+			fs_ptr++;
+			end_ptr--;
+			bloc_len--;
+		}
+		if(!fs_ptr)
+			end_ptr -= bloc_len;	
+	}
+}
+
+long int resolve_part2(char *input, char **split)
+{
+	(void)split;
+	int *disk;
+	size_t len;
+	size_t i;	
+	long int res;
+	disk = get_nbrs(input, &len);
+	frag_disk(disk, len);
+	i = 0;
+	res = 0;
+	while(i < len)
+	{
+		if(disk[i] != -1)
+			res += disk[i] * i;
+		i++;
+	}
+	free(disk);
+	return(res);
+}

2024/9/test

@@ -0,0 +1 @@
+2333133121414131402