simplified d2

This commit is contained in:
Duy Truong 2023-12-02 09:24:51 -08:00
parent 3e7812b556
commit 9370f1ac95
4 changed files with 18 additions and 32 deletions

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@ -2,19 +2,6 @@
#include <stdlib.h> #include <stdlib.h>
#define MAX_LENGTH 165 #define MAX_LENGTH 165
char* skip_color(char* c) {
switch (*c) {
case 'r':
return c + 3;
case 'g':
return c + 5;
case 'b':
return c + 4;
}
abort();
}
int main(void) { int main(void) {
char buf[MAX_LENGTH]; char buf[MAX_LENGTH];
int game_num, cubes, sum; int game_num, cubes, sum;
@ -32,7 +19,7 @@ int main(void) {
(*c == 'b' && cubes > 14)) { (*c == 'b' && cubes > 14)) {
game_num = 0; game_num = 0;
} }
c = skip_color(c); for (; *c >= 'a' && *c <= 'z'; c++);
} }
sum += game_num; sum += game_num;
} }

7
02/part1.py Normal file
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@ -0,0 +1,7 @@
import re, sys
print(sum(
int(re.search("[0-9]+", line).group())
for line in sys.stdin.readlines()
if all(int(r) <= 12 for r in re.findall(r"[0-9]+(?= red)", line))
and all(int(g) <= 13 for g in re.findall(r"[0-9]+(?= green)", line))
and all(int(b) <= 14 for b in re.findall(r"[0-9]+(?= blue)", line))))

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@ -2,35 +2,23 @@
#include <stdlib.h> #include <stdlib.h>
#define MAX_LENGTH 165 #define MAX_LENGTH 165
char* skip_color(char* c) {
switch (*c) {
case 'r':
return c + 3;
case 'g':
return c + 5;
case 'b':
return c + 4;
}
abort();
}
int main(void) { int main(void) {
char buf[MAX_LENGTH]; char buf[MAX_LENGTH];
int game_num, color_num, sum, max_r, max_g, max_b; int color_num, sum, max_r, max_g, max_b;
sum = 0; sum = 0;
while (fgets(buf, MAX_LENGTH, stdin)) { while (fgets(buf, MAX_LENGTH, stdin)) {
char* c = buf; char* c = buf + 5; // +5 skips the "Game "
game_num = strtol(c + 5, &c, 10); // +5 skips the "Game " for (; *c != ':'; c++);
max_r = max_g = max_b = 0;
max_r = max_g = max_b = 0;
while (*c != '\n') { while (*c != '\n') {
color_num = strtol(c + 2, &c, 10); // +2 skips ": ", ", ", or "; " color_num = strtol(c + 2, &c, 10); // +2 skips ": ", ", " or "; "
c++; // +1 skips the space c++; // +1 skips the space
max_r = (*c == 'r' && color_num > max_r) ? color_num : max_r; max_r = (*c == 'r' && color_num > max_r) ? color_num : max_r;
max_g = (*c == 'g' && color_num > max_g) ? color_num : max_g; max_g = (*c == 'g' && color_num > max_g) ? color_num : max_g;
max_b = (*c == 'b' && color_num > max_b) ? color_num : max_b; max_b = (*c == 'b' && color_num > max_b) ? color_num : max_b;
c = skip_color(c); for (; *c >= 'a' && *c <= 'z'; c++);
} }
sum += max_r * max_g * max_b; sum += max_r * max_g * max_b;
} }

4
02/part2.py Normal file
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@ -0,0 +1,4 @@
import math, re, sys
print(sum(math.prod(max(int(n) for n in re.findall(f"[0-9]+(?= {color})", line))
for color in ("red", "green", "blue"))
for line in open("input.txt", "rt").readlines()))