commit 026025a79f15dbcc3864999a21061885bccc74a8
parent 53c8d632d6ff7da0980ecec35c40d37a5acdf77a
Author: bsandro <brian.drosan@gmail.com>
Date: Fri, 24 Dec 2021 13:01:52 +0200
Day22, puzzle 2
Diffstat:
5 files changed, 137 insertions(+), 63 deletions(-)
diff --git a/day22/Makefile b/day22/Makefile
@@ -4,7 +4,7 @@ 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 -lm -fsanitize=address
-#CFLAGS=-O2 -std=c99 -Werror -Wall -Wextra -I. -I../common
+#CFLAGS=-O0 -g -std=c99 -Werror -Wall -Wextra -I. -I../common
#LDFLAGS=-lc -lm
all: $(NAME)
@@ -24,4 +24,4 @@ run: $(NAME)
@./$(NAME) input.txt
test: $(NAME)
- @./$(NAME) test.txt
+ @./$(NAME) test2.txt
diff --git a/day22/puzzle.c b/day22/puzzle.c
@@ -15,13 +15,16 @@
#define STR_LEN 1024
struct cuboid_t {
- int x1, y1, x2, y2, z1, z2;
+ long long x1, y1, x2, y2, z1, z2;
bool on;
};
void parse_cuboid(struct array_t *array, const char *str);
void init_cubes(bool (*cubes)[101][101][101], struct array_t *cuboids);
long long count_cubes(bool (*cubes)[101][101][101]);
+struct array_t subtract_cuboid(struct cuboid_t *c1, struct cuboid_t *c2);
+void add_cuboid(struct array_t *cuboids, struct cuboid_t *cuboid);
+long long cuboid_size(struct cuboid_t *cuboid);
void puzzle(const char *filename, long long *result1, long long *result2) {
FILE *infile = fopen(filename, "r");
@@ -45,13 +48,114 @@ void puzzle(const char *filename, long long *result1, long long *result2) {
init_cubes(&cubes, &sequence);
*result1 = count_cubes(&cubes);
+ struct array_t cuboids = { .data = NULL };
+ array_init(&cuboids, sizeof(struct cuboid_t), 100);
+
+ struct cuboid_t *seq_data = sequence.data;
+ for (size_t i = 0; i < sequence.count; ++i) {
+ struct cuboid_t *seq_cuboid = &seq_data[i];
+ seq_cuboid->x2 += 1;
+ seq_cuboid->y2 += 1;
+ seq_cuboid->z2 += 1;
+ struct array_t new_cuboids = { .data = NULL };
+ array_init(&new_cuboids, sizeof(struct cuboid_t), 100);
+
+ struct cuboid_t *cuboids_data = cuboids.data;
+ for (size_t j = 0; j < cuboids.count; ++j) {
+ struct cuboid_t *c = &cuboids_data[j];
+ struct array_t subtracted = subtract_cuboid(c, seq_cuboid);
+ struct cuboid_t *subtracted_data = subtracted.data;
+ for (size_t k = 0; k < subtracted.count; ++k) {
+ if (cuboid_size(&subtracted_data[k]) > 0) {
+ add_cuboid(&new_cuboids, &subtracted_data[k]);
+ }
+ }
+ free(subtracted.data);
+ }
+ if (seq_cuboid->on) {
+ add_cuboid(&new_cuboids, seq_cuboid);
+ }
+ free(cuboids.data);
+ cuboids = new_cuboids;
+ cuboids.cap = cuboids.count;
+ }
+
*result2 = 0;
+ struct cuboid_t *cuboids_data = cuboids.data;
+ for (size_t i = 0; i < cuboids.count; ++i) {
+ *result2 += cuboid_size(&cuboids_data[i]);
+ }
free(sequence.data);
// mutiny! ignoring feof/ferror.
fclose(infile);
}
+void add_cuboid(struct array_t *cuboids, struct cuboid_t *cuboid) {
+ if (cuboids->count >= cuboids->cap) {
+ array_expand(cuboids);
+ }
+ struct cuboid_t *cuboids_data = cuboids->data;
+ cuboids_data[cuboids->count++] = *cuboid;
+}
+
+struct array_t subtract_cuboid(struct cuboid_t *c1, struct cuboid_t *c2) {
+ assert(c1 != NULL && c2 != NULL);
+
+ struct array_t array = { .data = NULL };
+ array_init(&array, sizeof(struct cuboid_t), 6);
+ struct cuboid_t *cuboids = array.data;
+
+ if (!(c1->x1 < c2->x2 && c1->x2 > c2->x1 &&
+ c1->y1 < c2->y2 && c1->y2 > c2->y1 &&
+ c1->z1 < c2->z2 && c1->z2 > c2->z1)) {
+
+ add_cuboid(&array, c1);
+ return array;
+ } else {
+ struct cuboid_t c = {
+ .x1 = fmin(fmax(c1->x1, c2->x1), c1->x2),
+ .x2 = fmin(fmax(c1->x1, c2->x2), c1->x2),
+ .y1 = fmin(fmax(c1->y1, c2->y1), c1->y2),
+ .y2 = fmin(fmax(c1->y1, c2->y2), c1->y2),
+ .z1 = fmin(fmax(c1->z1, c2->z1), c1->z2),
+ .z2 = fmin(fmax(c1->z1, c2->z2), c1->z2)
+ };
+ struct cuboid_t *c3 = &c;
+ cuboids[array.count++] = (struct cuboid_t){
+ .x1 = c1->x1, .x2 = c3->x1,
+ .y1 = c1->y1, .y2 = c1->y2,
+ .z1 = c1->z1, .z2 = c1->z2
+ };
+ cuboids[array.count++] = (struct cuboid_t){
+ .x1 = c3->x2, .x2 = c1->x2,
+ .y1 = c1->y1, .y2 = c1->y2,
+ .z1 = c1->z1, .z2 = c1->z2
+ };
+ cuboids[array.count++] = (struct cuboid_t){
+ .x1 = c3->x1, .x2 = c3->x2,
+ .y1 = c1->y1, .y2 = c3->y1,
+ .z1 = c1->z1, .z2 = c1->z2
+ };
+ cuboids[array.count++] = (struct cuboid_t){
+ .x1 = c3->x1, .x2 = c3->x2,
+ .y1 = c3->y2, .y2 = c1->y2,
+ .z1 = c1->z1, .z2 = c1->z2
+ };
+ cuboids[array.count++] = (struct cuboid_t){
+ .x1 = c3->x1, .x2 = c3->x2,
+ .y1 = c3->y1, .y2 = c3->y2,
+ .z1 = c1->z1, .z2 = c3->z1
+ };
+ cuboids[array.count++] = (struct cuboid_t){
+ .x1 = c3->x1, .x2 = c3->x2,
+ .y1 = c3->y1, .y2 = c3->y2,
+ .z1 = c3->z2, .z2 = c1->z2
+ };
+ return array;
+ }
+}
+
void init_cubes(bool (*cubes)[101][101][101], struct array_t *sequence) {
assert(cubes != NULL);
assert(sequence != NULL);
@@ -141,3 +245,7 @@ void parse_cuboid(struct array_t *array, const char *str) {
struct cuboid_t *cuboids = array->data;
cuboids[array->count++] = cuboid;
}
+
+long long cuboid_size(struct cuboid_t *cuboid) {
+ return (cuboid->x2 - cuboid->x1) * (cuboid->y2 - cuboid->y1) * (cuboid->z2 - cuboid->z1);
+}
diff --git a/day22/test.txt b/day22/test.txt
@@ -1,60 +1,4 @@
-on x=-5..47,y=-31..22,z=-19..33
-on x=-44..5,y=-27..21,z=-14..35
-on x=-49..-1,y=-11..42,z=-10..38
-on x=-20..34,y=-40..6,z=-44..1
-off x=26..39,y=40..50,z=-2..11
-on x=-41..5,y=-41..6,z=-36..8
-off x=-43..-33,y=-45..-28,z=7..25
-on x=-33..15,y=-32..19,z=-34..11
-off x=35..47,y=-46..-34,z=-11..5
-on x=-14..36,y=-6..44,z=-16..29
-on x=-57795..-6158,y=29564..72030,z=20435..90618
-on x=36731..105352,y=-21140..28532,z=16094..90401
-on x=30999..107136,y=-53464..15513,z=8553..71215
-on x=13528..83982,y=-99403..-27377,z=-24141..23996
-on x=-72682..-12347,y=18159..111354,z=7391..80950
-on x=-1060..80757,y=-65301..-20884,z=-103788..-16709
-on x=-83015..-9461,y=-72160..-8347,z=-81239..-26856
-on x=-52752..22273,y=-49450..9096,z=54442..119054
-on x=-29982..40483,y=-108474..-28371,z=-24328..38471
-on x=-4958..62750,y=40422..118853,z=-7672..65583
-on x=55694..108686,y=-43367..46958,z=-26781..48729
-on x=-98497..-18186,y=-63569..3412,z=1232..88485
-on x=-726..56291,y=-62629..13224,z=18033..85226
-on x=-110886..-34664,y=-81338..-8658,z=8914..63723
-on x=-55829..24974,y=-16897..54165,z=-121762..-28058
-on x=-65152..-11147,y=22489..91432,z=-58782..1780
-on x=-120100..-32970,y=-46592..27473,z=-11695..61039
-on x=-18631..37533,y=-124565..-50804,z=-35667..28308
-on x=-57817..18248,y=49321..117703,z=5745..55881
-on x=14781..98692,y=-1341..70827,z=15753..70151
-on x=-34419..55919,y=-19626..40991,z=39015..114138
-on x=-60785..11593,y=-56135..2999,z=-95368..-26915
-on x=-32178..58085,y=17647..101866,z=-91405..-8878
-on x=-53655..12091,y=50097..105568,z=-75335..-4862
-on x=-111166..-40997,y=-71714..2688,z=5609..50954
-on x=-16602..70118,y=-98693..-44401,z=5197..76897
-on x=16383..101554,y=4615..83635,z=-44907..18747
-off x=-95822..-15171,y=-19987..48940,z=10804..104439
-on x=-89813..-14614,y=16069..88491,z=-3297..45228
-on x=41075..99376,y=-20427..49978,z=-52012..13762
-on x=-21330..50085,y=-17944..62733,z=-112280..-30197
-on x=-16478..35915,y=36008..118594,z=-7885..47086
-off x=-98156..-27851,y=-49952..43171,z=-99005..-8456
-off x=2032..69770,y=-71013..4824,z=7471..94418
-on x=43670..120875,y=-42068..12382,z=-24787..38892
-off x=37514..111226,y=-45862..25743,z=-16714..54663
-off x=25699..97951,y=-30668..59918,z=-15349..69697
-off x=-44271..17935,y=-9516..60759,z=49131..112598
-on x=-61695..-5813,y=40978..94975,z=8655..80240
-off x=-101086..-9439,y=-7088..67543,z=33935..83858
-off x=18020..114017,y=-48931..32606,z=21474..89843
-off x=-77139..10506,y=-89994..-18797,z=-80..59318
-off x=8476..79288,y=-75520..11602,z=-96624..-24783
-on x=-47488..-1262,y=24338..100707,z=16292..72967
-off x=-84341..13987,y=2429..92914,z=-90671..-1318
-off x=-37810..49457,y=-71013..-7894,z=-105357..-13188
-off x=-27365..46395,y=31009..98017,z=15428..76570
-off x=-70369..-16548,y=22648..78696,z=-1892..86821
-on x=-53470..21291,y=-120233..-33476,z=-44150..38147
-off x=-93533..-4276,y=-16170..68771,z=-104985..-24507
+on x=10..12,y=10..12,z=10..12
+on x=11..13,y=11..13,z=11..13
+off x=9..11,y=9..11,z=9..11
+on x=10..10,y=10..10,z=10..10
diff --git a/day22/test1.txt b/day22/test1.txt
@@ -0,0 +1,22 @@
+on x=-20..26,y=-36..17,z=-47..7
+on x=-20..33,y=-21..23,z=-26..28
+on x=-22..28,y=-29..23,z=-38..16
+on x=-46..7,y=-6..46,z=-50..-1
+on x=-49..1,y=-3..46,z=-24..28
+on x=2..47,y=-22..22,z=-23..27
+on x=-27..23,y=-28..26,z=-21..29
+on x=-39..5,y=-6..47,z=-3..44
+on x=-30..21,y=-8..43,z=-13..34
+on x=-22..26,y=-27..20,z=-29..19
+off x=-48..-32,y=26..41,z=-47..-37
+on x=-12..35,y=6..50,z=-50..-2
+off x=-48..-32,y=-32..-16,z=-15..-5
+on x=-18..26,y=-33..15,z=-7..46
+off x=-40..-22,y=-38..-28,z=23..41
+on x=-16..35,y=-41..10,z=-47..6
+off x=-32..-23,y=11..30,z=-14..3
+on x=-49..-5,y=-3..45,z=-29..18
+off x=18..30,y=-20..-8,z=-3..13
+on x=-41..9,y=-7..43,z=-33..15
+on x=-54112..-39298,y=-85059..-49293,z=-27449..7877
+on x=967..23432,y=45373..81175,z=27513..53682
diff --git a/day22/test.txt b/day22/test2.txt
