From: Mart Lubbers Date: Mon, 6 Dec 2021 06:00:24 +0000 (+0100) Subject: day 6 X-Git-Url: https://git.martlubbers.net/?a=commitdiff_plain;h=46b95a2f1d484eed878202f204561932dd9c548b;p=advent21.git day 6 --- diff --git a/03b.c b/03b.c index c940822..2213374 100644 --- a/03b.c +++ b/03b.c @@ -35,16 +35,14 @@ int main(void) unsigned numbers[2000] = {0}; int c = 0, y = 0, maxbits = 0, bits = 0; while ((c = getchar()) != EOF) { - if (c == '0') { - numbers[y] = numbers[y]*2; - bits++; - } else if (c == '1') { - numbers[y] = numbers[y]*2+1; - bits++; - } else if (c == '\n') { + if (c == '\n') { maxbits = bits > maxbits ? bits : maxbits; bits = 0; y++; + } else { + numbers[y] *= 2; + if (c == '1') + numbers[y]++; } } diff --git a/06.txt b/06.txt new file mode 100644 index 0000000..b800e1c --- /dev/null +++ b/06.txt @@ -0,0 +1 @@ +1,5,5,1,5,1,5,3,1,3,2,4,3,4,1,1,3,5,4,4,2,1,2,1,2,1,2,1,5,2,1,5,1,2,2,1,5,5,5,1,1,1,5,1,3,4,5,1,2,2,5,5,3,4,5,4,4,1,4,5,3,4,4,5,2,4,2,2,1,3,4,3,2,3,4,1,4,4,4,5,1,3,4,2,5,4,5,3,1,4,1,1,1,2,4,2,1,5,1,4,5,3,3,4,1,1,4,3,4,1,1,1,5,4,3,5,2,4,1,1,2,3,2,4,4,3,3,5,3,1,4,5,5,4,3,3,5,1,5,3,5,2,5,1,5,5,2,3,3,1,1,2,2,4,3,1,5,1,1,3,1,4,1,2,3,5,5,1,2,3,4,3,4,1,1,5,5,3,3,4,5,1,1,4,1,4,1,3,5,5,1,4,3,1,3,5,5,5,5,5,2,2,1,2,4,1,5,3,3,5,4,5,4,1,5,1,5,1,2,5,4,5,5,3,2,2,2,5,4,4,3,3,1,4,1,2,3,1,5,4,5,3,4,1,1,2,2,1,2,5,1,1,1,5,4,5,2,1,4,4,1,1,3,3,1,3,2,1,5,2,3,4,5,3,5,4,3,1,3,5,5,5,5,2,1,1,4,2,5,1,5,1,3,4,3,5,5,1,4,3 diff --git a/06a.c b/06a.c new file mode 100644 index 0000000..92a1b8a --- /dev/null +++ b/06a.c @@ -0,0 +1,34 @@ +#include +#include +#include + +int main() +{ + char buf[1000]; + if (fgets(buf, 1000, stdin) == NULL) + return 1; + long fish0[9] = {0}; + long fish1[9] = {0}; + long *this = &fish0[0]; + long *that = &fish1[0]; + + char *p = strtok(buf, ","); + this[atoi(p)]++; + while ((p = strtok(NULL, ",")) != NULL) + this[atoi(p)]++; + + for (long day = 0; day<80; day++) { + that[8] = this[0]; + for (long i = 0; i<8; i++) + that[i] = this[i+1]; + that[6] += this[0]; + long *tmp = this; + this = that; + that = tmp; + } + + long sum = 0; + for (long i = 0; i<=8; i++) + sum += this[i]; + printf("%lu\n", sum); +} diff --git a/06b.c b/06b.c new file mode 100644 index 0000000..abc9892 --- /dev/null +++ b/06b.c @@ -0,0 +1,34 @@ +#include +#include +#include + +int main() +{ + char buf[1000]; + if (fgets(buf, 1000, stdin) == NULL) + return 1; + long fish0[9] = {0}; + long fish1[9] = {0}; + long *this = &fish0[0]; + long *that = &fish1[0]; + + char *p = strtok(buf, ","); + this[atoi(p)]++; + while ((p = strtok(NULL, ",")) != NULL) + this[atoi(p)]++; + + for (long day = 0; day<256; day++) { + that[8] = this[0]; + for (long i = 0; i<8; i++) + that[i] = this[i+1]; + that[6] += this[0]; + long *tmp = this; + this = that; + that = tmp; + } + + long sum = 0; + for (long i = 0; i<=8; i++) + sum += this[i]; + printf("%lu\n", sum); +} diff --git a/06e.txt b/06e.txt new file mode 100644 index 0000000..55129f1 --- /dev/null +++ b/06e.txt @@ -0,0 +1 @@ +3,4,3,1,2 diff --git a/Makefile b/Makefile index dfdd641..5da4afc 100644 --- a/Makefile +++ b/Makefile @@ -1,7 +1,7 @@ CFLAGS:=-Wall -Wextra -O3 LFLAGS:=-f -BINARIES:=$(foreach num,$(shell seq -f '%02.0f' 1 5),$(num)a $(num)b) +BINARIES:=$(foreach num,$(shell seq -f '%02.0f' 1 6),$(num)a $(num)b) all: $(BINARIES)