commit ce286aba148826c1d5ffe36749406ff05d583067
parent 6f73f35dfebaab334028271e8d40c8e0485b7178
Author: bsandro <brian.drosan@gmail.com>
Date: Sat, 4 Dec 2021 03:11:01 +0200
Day 03, puzzle 1
Diffstat:
5 files changed, 1114 insertions(+), 0 deletions(-)
diff --git a/day03/Makefile b/day03/Makefile
@@ -0,0 +1,23 @@
+NAME=$(shell basename ${PWD})
+CC=cc
+SRC=$(wildcard *.c)
+DEPS:=$(wildcard *.h)
+OBJ:=$(SRC:.c=.o)
+
+CFLAGS=-O0 -std=c99 -g -Werror -Wall -Wextra -I.
+
+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
diff --git a/day03/input.txt b/day03/input.txt
@@ -0,0 +1,1000 @@
+011110011110
+101101001111
+000000010101
+100111001010
+110000011010
+011101010101
+011110001100
+010111111001
+111011100101
+011110000110
+010100001111
+000001001100
+110001001000
+001000100101
+010100011110
+010111011110
+110101001111
+011010111011
+000011010101
+100111011100
+010010100011
+010010011001
+000111010011
+111001000111
+100101111111
+011001101110
+110010101100
+001000010001
+110101100011
+101110001011
+010100000110
+001110011110
+011101100110
+001111101101
+000101101000
+100110000111
+000001010100
+111100010110
+000100100100
+001000110001
+101000001011
+101000100110
+110000101010
+010111110000
+111110010110
+011011111111
+111010100000
+100001000111
+011000001010
+011000010001
+101101100001
+011001101011
+111001001010
+000010110101
+101110100010
+001111111101
+011110001001
+000111100011
+010101001001
+111110111111
+111000111010
+001001111100
+000011000001
+011100010110
+110010000111
+000010010101
+110000001110
+010011111011
+001010100100
+111001010101
+001101000011
+110100110011
+110010100101
+001000001011
+111110011000
+110111011011
+110110101001
+010010100100
+111100001100
+100100001100
+110001111010
+111011001011
+010000010001
+110010100000
+010100011100
+000110001001
+010011000001
+111011010001
+010011111101
+111101110100
+110110101100
+010100111110
+100011001101
+000010000010
+011111100001
+100000101100
+100001110011
+100101100100
+000100001001
+101000000011
+110111101100
+100100101001
+001001101001
+000001010000
+001001111110
+111011111010
+001000011110
+110000100111
+010010010101
+011010001011
+100010010101
+010110101010
+011111001011
+110010011100
+111110101010
+000001111010
+111101110101
+101010110111
+100010101111
+000110101110
+000000010000
+000010100110
+111110010001
+000100110000
+110010011011
+101001000010
+010110000101
+100011100100
+110000110100
+110011000001
+101110001000
+010100011111
+111000100111
+110001100010
+100001101000
+101001000111
+111110100000
+000011000010
+110000000001
+111010000111
+100100111011
+101101110001
+111100110100
+100110010000
+001001001110
+100010001001
+101000110100
+011100001111
+001110100110
+110100001100
+101101001011
+000011111110
+101101010100
+000110110001
+011100011001
+111000111111
+011010101100
+111000100101
+100111011110
+011010100110
+110000101111
+110010000001
+100001110101
+110101011111
+111111000011
+101010010010
+000111111111
+000001001111
+101101010010
+111111001000
+001001110000
+110010011110
+110011001111
+100111101011
+011111000111
+110010111100
+010110000000
+110001100011
+111000100001
+011000101000
+100110001100
+001101011011
+011001111110
+011101000110
+110110111001
+110101001010
+111000111011
+100111010001
+100110000011
+010001000100
+001001001000
+010010001010
+010101101101
+001110001001
+101110011111
+010111001111
+110111001110
+100000101011
+010000111111
+101000101011
+101011010111
+000101110001
+100100010010
+100111011101
+111100000100
+100110000001
+000001000101
+101100001111
+100000101001
+010101010110
+000110010111
+011101001100
+000111111011
+000001100101
+100001011011
+111000101110
+111101100111
+011010010100
+101001001010
+110100110001
+111101011101
+000011101110
+011000100100
+101110000111
+011101110110
+111001010001
+011110000100
+011110001101
+100111100001
+010011100001
+001001101101
+001111111010
+010101000101
+011100000110
+100010001101
+011011101011
+110111001010
+101000010010
+111111100011
+000101111011
+001101010011
+100101000001
+101101100011
+101110010011
+011001100000
+110001111111
+011100101100
+010010001110
+111110101101
+010110001000
+000011000110
+101010011011
+000100111011
+001000111101
+010011111111
+011101100111
+111111011111
+001100000000
+101100001110
+101100001000
+100001011111
+100001000101
+000101011001
+010100111100
+110000111011
+010000111100
+011100110000
+101111110010
+100011110101
+100100110101
+100001100000
+101000100101
+111000001100
+010000001011
+110101010111
+011011001000
+100111000101
+011000000100
+110110011000
+101101101101
+100101110010
+001100001010
+010111000011
+111111100001
+100010111011
+110011001001
+000011011101
+001100101101
+010110011001
+111100110010
+011111001110
+100110001111
+000111101111
+011000110001
+001010001010
+000111010100
+010011110101
+011111000010
+000101000010
+111101011010
+110011111100
+100000001000
+100001000110
+101010100001
+000101000101
+100100011111
+110000101110
+000110000101
+001001011111
+100010011100
+000001110001
+110000010100
+011111010100
+001000001111
+000111000001
+110010001000
+001001111101
+111000001001
+001011000001
+111110010100
+110010001100
+010110110000
+011100100010
+011000101011
+001001000001
+011001001110
+111000010100
+000110000110
+011011000100
+011000010111
+110001011000
+010111011000
+000101110100
+000000011111
+001100111100
+000010100101
+000111110000
+000110000001
+000100101001
+101111110100
+010010000001
+001100010001
+101111001101
+111011111101
+000011110011
+111001011100
+010110110110
+000000001101
+010010000000
+000001010011
+101000010000
+101000001110
+010001000111
+111010011011
+101001111110
+000110101100
+100110101001
+100111111111
+101001101001
+110010010011
+011001011111
+111111110110
+101110010110
+100100001101
+010001111110
+111111101000
+100010100001
+011110010100
+101000110011
+010110110011
+011111001000
+100010100101
+110010010110
+111011001000
+101110001101
+000010110011
+001110100100
+100000011101
+011001100001
+011001101010
+001100011101
+000111101100
+001010001001
+111001101110
+110110001111
+001111001010
+001001000011
+001000010000
+000001111110
+000101101111
+001001000110
+100001101110
+101111011100
+111110010010
+010001100011
+101000100111
+001101000111
+111011110011
+000011000101
+111101001110
+110111111111
+011100010100
+110011110001
+001011011001
+000011010111
+011000001110
+000101010111
+110101110001
+001100001111
+110111010111
+110010010101
+100111100111
+101000000111
+101111000100
+100011100010
+000100100101
+111011110110
+001111100110
+011011000010
+100010010100
+010111110010
+100010110011
+111111111000
+011010101111
+101110111011
+101110101010
+001011001000
+110110001011
+110100101111
+001011001011
+110011010000
+000000100000
+100000110000
+101110011011
+100101101111
+010110100010
+000010100011
+000110110000
+111101000001
+011001010011
+000000001110
+000100110101
+111111111110
+001010101001
+001101100111
+010100000101
+000111001001
+101100101110
+011011110111
+011010000011
+000100101011
+100001100110
+000111011101
+000100011100
+000101100101
+011111111110
+111010111011
+100000100101
+011001011110
+010101100010
+010101111101
+100001000001
+001000100001
+010010111110
+100011001011
+011011000111
+110011010101
+111101100100
+001110001010
+110011111101
+111011011101
+001101000001
+101011011011
+100000111010
+010101110101
+000101011100
+011000011001
+111001010011
+100100010110
+111101010001
+110110011011
+011110110100
+101000110101
+101110111101
+011011011110
+000100110110
+100011011111
+111010101001
+011111011000
+101000101110
+110010111001
+111010000010
+110011011001
+110110010100
+111010011010
+000010110001
+011101100010
+110010110111
+010101001111
+011011001101
+101111000110
+010111010010
+101111011011
+100111101100
+001000001101
+010110100000
+001010100110
+111111000111
+100101000100
+100101001100
+110111010110
+101000101000
+100001001111
+110011110010
+111111101111
+110001111000
+010001110110
+101100000010
+000110000111
+001011100101
+101010100101
+110110001001
+000011011111
+110110101110
+101100110010
+101110101110
+101010110101
+000111000011
+101000011111
+001100000111
+101001111111
+100100011101
+111100011011
+000010111010
+111010101010
+101001010010
+101100010011
+010000110110
+011110110011
+001101110111
+110111110110
+001011000100
+101111100010
+011010011100
+110100001010
+100100110111
+000011010011
+000110111010
+001100100000
+100111011011
+001101101011
+101011101111
+001101100100
+111010010111
+100111111100
+101101000100
+000011111100
+011111001101
+110101001101
+011100100110
+101011000000
+100001010011
+011110111110
+011011100110
+110001011010
+111111110101
+001111111000
+100010011011
+100001101100
+110011010100
+100011000001
+011110111001
+010111110110
+100110001010
+100000000011
+001001101111
+101111011010
+010000110100
+101001011110
+100100011000
+101101000111
+011101001001
+010101110010
+000110000000
+000100111000
+010110111010
+110000011111
+011001011100
+010100110110
+011111110011
+111011011010
+001000101011
+000010110100
+011100101000
+111111100110
+011001110100
+000100011000
+010101010111
+001011101000
+001000011100
+110101101100
+010001000010
+001010010000
+111000110001
+101111111111
+011101011110
+001001111010
+001000100110
+000011011001
+100101100001
+110111000000
+100111011111
+111000110000
+110010111111
+000010010011
+100001100111
+010110100100
+001101001010
+101001100110
+010001110101
+001011000010
+010111110101
+000001001110
+010010100110
+111011001110
+101011111001
+000100000000
+111101001100
+100111011010
+000010010001
+100000010000
+101101000010
+110100010100
+111011111000
+101001100100
+001110101011
+000111001010
+111110000011
+001110100101
+101010000101
+010101010011
+110000111100
+101011001010
+010001011011
+010000011010
+000010101011
+100110110101
+100111011001
+100111010111
+000101100000
+101110000001
+100100001000
+010111000010
+000101001010
+001110010010
+111011000111
+001110110010
+111010000001
+011000100101
+000111100101
+100000100111
+100110011011
+001011100001
+101010100111
+011001111000
+000011011010
+001011101100
+010011011001
+000111111100
+010001011110
+111111011010
+111010010101
+110000010011
+001001101010
+000101011011
+100111111110
+110010101001
+111000011000
+011100101110
+011100010001
+001101110010
+101000111111
+101011011001
+110111000110
+001000010100
+000111000100
+010000101110
+001100100001
+111100000011
+111011101010
+000001111000
+100100010000
+110110000110
+000010111100
+110110110111
+010000011011
+101110000100
+011100100100
+010111001011
+001011010000
+000111010001
+110010111000
+001011011110
+000001100111
+010000101111
+110001100100
+111000001101
+000110011001
+010000010110
+101010001110
+111000111000
+011111011100
+111001110110
+111100010001
+110101111001
+001001010011
+010001111001
+001101101110
+010011000010
+000100011011
+000001101000
+001110100001
+100011010011
+100000011100
+011001010111
+110011011010
+100110001011
+011001110111
+001010001100
+000111010111
+110111111101
+111001101010
+001110001000
+011100001010
+010011101010
+111011010011
+000011001010
+100101000110
+100101010111
+110010100010
+010100101111
+111011011100
+100011100101
+101111111101
+001001110011
+110111101001
+100100010101
+010101100001
+100011000011
+001010010111
+011001001001
+110001101001
+010011100010
+111000001111
+010101111111
+001001001011
+000111110111
+100110111101
+011011110000
+001001011110
+011010101101
+111011101011
+010001100111
+110100001111
+100010110111
+000000010100
+100000010001
+010011010101
+010011100110
+100011111011
+110110100001
+110000100110
+110101100000
+110001101011
+110110100110
+101111101110
+011010101011
+101001010101
+110110111101
+100111100010
+101100100010
+101011101101
+010011010011
+001111011100
+100101010100
+101010101010
+010000011101
+011100000010
+100111101000
+111111010101
+011010101000
+001010110010
+111110010011
+110111011010
+010010111111
+111001100111
+010101111000
+000111110011
+111101000110
+001011000000
+110100100110
+101001110010
+101111011001
+111110000001
+011101110010
+011000010110
+101011010010
+100110011101
+000010011101
+001111110100
+110011001100
+111110111100
+011001011000
+001110000011
+110001001101
+111110111011
+110000000000
+010000110001
+000100110001
+001000101101
+001100110111
+101011001111
+110011110011
+010011100101
+001001000000
+011110100000
+001010110111
+110101111101
+001111000000
+100011011001
+100000001001
+000010101010
+110000100000
+111111101001
+111010101100
+101100110111
+110100011000
+010011000111
+010010001000
+001011001111
+001001001100
+100010110110
+111100111011
+111100101100
+000111111101
+101110000011
+100001011101
+111101110011
+100100000011
+111110011001
+100010111101
+110001001010
+111111100100
+010000110101
+001100001101
+001001110111
+110110101010
+011110010010
+101011010000
+101101110010
+010010110000
+011110100111
+010111000100
+010100000010
+000011110100
+111001011101
+010111100101
+110010101101
+011100010010
+001110111100
+011111110110
+001110100010
+000001100001
+011011110010
+000010111101
+001011111110
+111110111010
+001010101101
+100011110010
+001111110010
+011001110010
+100110101100
+010111010011
+001000010011
+111110110010
+011000000110
+011111111100
+000111110110
+110001110100
+101110010101
+010000111101
+011011101110
+011010100111
+001010000010
+100001100011
+110001000000
+101111100111
+101111110011
+001101110011
+110001110101
+100101010010
+010101011110
+000011111000
+000100001000
+101001110011
+011100110001
+000000011100
+111110010111
+101011101100
+110011101100
+110101011000
+010111001000
+111100001010
+001000011111
+010100111011
+101010101011
+001110001110
+100011000110
+000101101011
+110011010111
+111001011110
+111010100110
+010001110001
+011010101110
+101011110000
+001101010010
+001010000011
+011001000111
+010001000110
+010110011111
+001111011000
+000010010111
+100011110111
+111100111100
+010101010001
+100011101111
+011101011001
+001011001100
+001111000101
+110111011000
+011001001010
+010000000100
+100110111010
+000000111110
+011100100011
+100100111110
+000010011010
+111000000100
+001110001111
+011000101010
+011100110010
+110101000111
+110110111111
+101110110010
+000110100000
+110100001101
+000111101110
+111000111001
+000111111010
+010110111011
+000101110111
+111000011011
+010110001010
+001011111011
+100100100011
+011110110010
+000111110101
+110110011101
+000011000011
+110011001010
+000100101100
+101100100011
+010111000001
+110101100001
+011110111010
+111100101000
+010000100010
+110011000111
+010011011100
+100110101011
+000100001011
+101111000010
+010000010000
+111110000100
+111100011110
+010100111001
+100000011111
+010111110100
+100100110011
+111101111001
+100010011000
+111110101111
+010111001010
+110000101000
+001111111111
+000111100110
+000011101100
+011010001000
+001011010011
+110011111011
diff --git a/day03/main.c b/day03/main.c
@@ -0,0 +1,24 @@
+#include <stdio.h>
+#include "puzzle1.h"
+//#include "puzzle2.h"
+
+int main(int argc, char *argv[]) {
+ printf("Advent of Code: day 03\n");
+
+ if (argc <= 0) {
+ return -1;
+ }
+ if (argc <= 1) {
+ printf("Usage: %s inputfile.txt\n", argv[0]);
+ return -1;
+ }
+
+ const char *filename = argv[1];
+
+ int counter1 = puzzle1(filename);
+ printf("Puzzle #1: %d\n", counter1);
+ //int counter2 = puzzle2(filename);
+ //printf("Puzzle #2: %d\n", counter2);
+
+ return 0;
+}
diff --git a/day03/puzzle1.c b/day03/puzzle1.c
@@ -0,0 +1,66 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+#include <strings.h>
+#include <stdbool.h>
+
+#define FMT_(l) #l
+#define FMT(l) FMT_(l)
+
+#define MAX_LEN 16
+#define BITS_COUNT 12
+#define STR_LEN 13 // BITS_COUNT + 1
+#define FMT_STRING "%" FMT(STR_LEN) "s"
+
+// No idea about the case when number (1/0) counts are equal, it is not described in the task.
+
+int puzzle1(const char *filename) {
+ FILE *infile = fopen(filename, "r");
+ if (infile == NULL) {
+ fprintf(stderr, "fopen() error: %s\n", strerror(errno));
+ return -1;
+ }
+
+ char buf[MAX_LEN] = {0};
+ char str[STR_LEN] = {0};
+ int ones_count[BITS_COUNT] = {0};
+ int glob_count = 0;
+
+ // reading file data, counting ones and zeroes
+ while (fgets(buf, MAX_LEN, infile) != NULL) {
+ if (sscanf(buf, FMT_STRING, str) == 1) {
+ for (int i = 0; i < BITS_COUNT; ++i) {
+ if (str[i] == '1') {
+ ++ones_count[i];
+ }
+ }
+ ++glob_count;
+ bzero(buf, MAX_LEN);
+ bzero(str, STR_LEN);
+ }
+ }
+
+ const int count_threshold = glob_count / 2;
+ int gamma = 0, epsilon = 0;
+ bool bit_val = 0;
+
+ // ones_count array: [bit#11, bit#10, bit#9, ... #bit0]
+ for (int i = 0; i < BITS_COUNT; ++i) {
+ // we count bits from 0, so need to subtract 1 to not set actual
+ // bit 12 that is above designated [bits 0..11] range
+ const int bit_num = BITS_COUNT - i - 1;
+ bit_val = ones_count[i] > count_threshold;
+
+ if (bit_val) {
+ gamma |= 1 << bit_num;
+ } else {
+ epsilon |= 1 << bit_num;
+ }
+ }
+
+ // mutiny! ignoring feof/ferror.
+
+ fclose(infile);
+ return gamma * epsilon;
+}
diff --git a/day03/puzzle1.h b/day03/puzzle1.h
@@ -0,0 +1 @@
+int puzzle1(const char *filename);
