commit 30a28fb0acb99550ad4370b820ab6a78cbff727b
parent 064374a6e534a628338bad38adea33b7aa8996c9
Author: bsandro <email@bsandro.tech>
Date: Sat, 13 Jan 2024 20:08:59 +0200
day 07 p1
Diffstat:
5 files changed, 1199 insertions(+), 0 deletions(-)
diff --git a/day07/Makefile b/day07/Makefile
@@ -0,0 +1,26 @@
+
+NAME=$(shell basename ${PWD})
+SRC=$(wildcard *.c)
+DEPS:=$(wildcard *.h)
+OBJ:=$(SRC:.c=.o)
+CFLAGS=-O2 -std=c11 -Werror -Wall -Wextra -I. -I../common
+LDFLAGS=-lc
+
+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/day07/input.txt b/day07/input.txt
@@ -0,0 +1,1000 @@
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diff --git a/day07/main.c b/day07/main.c
@@ -0,0 +1,30 @@
+#include <stdio.h>
+#include <time.h>
+#include <string.h>
+
+void puzzle(const char *filename, long long *res1, long long *res2);
+//void puzzle_test(const char *filename, long long *res1, long long *res2);
+
+int main(int argc, char *argv[]) {
+ printf("Advent of Code: day 07\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/day07/puzzle.c b/day07/puzzle.c
@@ -0,0 +1,138 @@
+#define _DEFAULT_SOURCE
+
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <string.h>
+#include <strings.h>
+#include <assert.h>
+#include <stdbool.h>
+#include <inttypes.h>
+
+#define STR_LEN 2048
+#define CARDS_LEN 5
+#define COUNTS_LEN 15
+
+typedef enum HandType {
+ Hand_Unknown = 0,
+ Hand_HighCard = 50000,
+ Hand_OnePair = 41000,
+ Hand_TwoPair = 32000,
+ Hand_ThreeOfAKind = 31100,
+ Hand_FullHouse = 22100,
+ Hand_FourOfAKind = 21110,
+ Hand_FiveOfAKind = 11111
+} HandType;
+
+typedef struct Hand {
+ HandType type;
+ int bid;
+ char cards_orig[CARDS_LEN+1];
+ int cards[CARDS_LEN];
+ int counts[COUNTS_LEN];
+ int32_t csum;
+} Hand;
+
+int get_card(char c) {
+ if (c>='2'&&c<='9') return c-'0';
+ if (c=='T') return 10;
+ if (c=='J') return 11;
+ if (c=='Q') return 12;
+ if (c=='K') return 13;
+ if (c=='A') return 14;
+ return -1;
+}
+
+void make_type(Hand *h) {
+ int sum = 10000*h->counts[0] +
+ 1000*h->counts[1] +
+ 100*h->counts[2] +
+ 10*h->counts[3] +
+ h->counts[4];
+ h->type = (HandType)sum;
+}
+
+void make_counts(Hand *h) {
+ for (int i=0; i<CARDS_LEN; ++i) {
+ h->counts[h->cards[i]]++;
+ }
+}
+
+void make_csum(Hand *h) {
+ h->csum = 100000000*get_card(h->cards_orig[0]) +
+ 1000000*get_card(h->cards_orig[1]) +
+ 10000*get_card(h->cards_orig[2]) +
+ 100*get_card(h->cards_orig[3]) +
+ get_card(h->cards_orig[4]);
+}
+
+static int cmp_cards(const void *c1, const void *c2) {
+ return *(int *)c1 - *(int *)c2;
+}
+
+static int cmp_counts(const void *c1, const void *c2) {
+ return *(int *)c2 - *(int *)c1;
+}
+
+static int cmp_hands(const void *v1, const void *v2) {
+ const Hand *h1 = (Hand *)v1;
+ const Hand *h2 = (Hand *)v2;
+ if (h1->type!=h2->type) {
+ return h1->type - h2->type;
+ }
+ return h1->csum - h2->csum;
+}
+
+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;
+ *result1 = 0;
+ *result2 = 0;
+
+ Hand *hands = NULL;
+ int hands_len = 0;
+ while (fgets(buf, STR_LEN, infile) != NULL) {
+ hands_len++;
+ hands = realloc(hands, sizeof(Hand)*hands_len);
+ Hand *h = &hands[hands_len-1];
+ memset(h, 0, sizeof(Hand));
+ sscanf(buf, "%s %d", h->cards_orig, &h->bid);
+ for (int i=0; i<CARDS_LEN; ++i) {
+ h->cards[i] = get_card(h->cards_orig[i]);
+ }
+ qsort(h->cards, CARDS_LEN, sizeof(int), cmp_cards);
+ make_counts(h);
+ make_csum(h);
+ qsort(h->counts, COUNTS_LEN, sizeof(int), cmp_counts);
+ make_type(h);
+ ++line_num;
+ bzero(buf, STR_LEN);
+ }
+
+ qsort(hands, hands_len, sizeof(Hand), cmp_hands);
+ for (int i=0; i<hands_len; ++i) {
+ printf("hand %2d %s, type %d, bid %3d; ", i, hands[i].cards_orig, hands[i].type, hands[i].bid);
+ for (int j=0; j<CARDS_LEN; ++j) {
+ printf("%2d ", hands[i].cards[j]);
+ }
+ printf(" csum: %10d | ", hands[i].csum);
+ for (int j=0; j<COUNTS_LEN; ++j) {
+ if (hands[i].counts[j]>0) {
+ printf("%d ", hands[i].counts[j]);
+ }
+ }
+ printf("\n");
+
+ *result1 += (i+1)*hands[i].bid;
+ }
+
+ // mutiny! ignoring feof/ferror.
+ fclose(infile);
+}
diff --git a/day07/test.txt b/day07/test.txt
@@ -0,0 +1,5 @@
+32T3K 765
+T55J5 684
+KK677 28
+KTJJT 220
+QQQJA 483
