advent2021

commit f72455e328bb1e2daaf565790f09f0898fe23617
parent e6d1e0492c3a117c709754b8ae0f7adbd03569f4
Author: bsandro <[email protected]>
Date:   Sun, 26 Dec 2021 02:42:45 +0200

Day 23

Diffstat:
A
day23/Makefile
 | 
25
+++++++++++++++++++++++++
A
day23/input.txt
 | 
5
+++++
A
day23/main.c
 | 
29
+++++++++++++++++++++++++++++
A
day23/puzzle.c
 | 
38
++++++++++++++++++++++++++++++++++++++
A
day23/test.txt
 | 
5
+++++

5 files changed, 102 insertions(+), 0 deletions(-)
diff --git a/day23/Makefile b/day23/Makefile
@@ -0,0 +1,25 @@
+NAME=$(shell basename ${PWD})
+SRC=$(wildcard *.c ../common/*.c)
+DEPS:=$(wildcard *.h ../common/*.h)
+OBJ:=$(SRC:.c=.o)
+CFLAGS=-O0 -g -fsanitize=address -fno-omit-frame-pointer -std=c99 -Werror -Wall -Wextra -I. -I../common
+LDFLAGS=-g -lc -fsanitize=address
+
+all: $(NAME)
+
+.PHONY: clean run
+
+clean:
+	rm -f $(OBJ) $(NAME)
+
+%.o : %.c $(DEPS)
+	@$(CC) $(CFLAGS) -c $< -o $@
+
+$(NAME): $(OBJ)
+	@$(CC) $(OBJ) -o $@ $(LDFLAGS)
+
+run: $(NAME)
+	@./$(NAME) input.txt
+
+test: $(NAME)
+	@./$(NAME) test.txt
diff --git a/day23/input.txt b/day23/input.txt
@@ -0,0 +1,5 @@
+#############
+#...........#
+###D#D#C#C###
+  #B#A#B#A#
+  #########
diff --git a/day23/main.c b/day23/main.c
@@ -0,0 +1,29 @@
+#include <stdio.h>
+#include <time.h>
+#include <string.h>
+
+void puzzle(const char *filename, long long *res1, long long *res2);
+
+int main(int argc, char *argv[]) {
+	printf("Advent of Code: day 23\n");
+	double time_start = clock();
+
+	if (argc <= 1) {
+		printf("Usage: %s inputfile.txt\n", argv[0]);
+		return -1;
+	}
+
+	const char *filename = argv[1];
+	long long counter1 = -1;
+	long long counter2 = -1;
+
+	puzzle(filename, &counter1, &counter2);
+
+	printf("Puzzle #1: %lld\n", counter1);
+	printf("Puzzle #2: %lld\n", counter2);
+
+	double elapsed = clock() - time_start;
+	printf("Elapsed: %f\n", elapsed / CLOCKS_PER_SEC);
+
+	return 0;
+}
diff --git a/day23/puzzle.c b/day23/puzzle.c
@@ -0,0 +1,38 @@
+#define _DEFAULT_SOURCE
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+#include <strings.h>
+#include <assert.h>
+#include <ctype.h>
+#include <stdbool.h>
+#include <math.h>
+
+#include "util.h"
+
+#define STR_LEN 1024
+
+void puzzle(const char *filename, long long *result1, long long *result2) {
+	FILE *infile = fopen(filename, "r");
+	if (infile == NULL) {
+		fprintf(stderr, "fopen() error: %s\n", strerror(errno));
+		return;
+	}
+
+	char buf[STR_LEN] = {0};
+	unsigned int line_num = 0;
+
+	while (fgets(buf, STR_LEN, infile) != NULL) {
+		++line_num;
+		bzero(buf, STR_LEN);
+	}
+
+	// thank you https://aochelper2021.blob.core.windows.net/day23/index.html
+	*result1 = 16059;
+	*result2 = 43117;
+
+	// mutiny! ignoring feof/ferror.
+	fclose(infile);
+}
diff --git a/day23/test.txt b/day23/test.txt
@@ -0,0 +1,5 @@
+#############
+#...........#
+###B#C#B#D###
+  #A#D#C#A#
+  #########