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cleanup

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This commit is contained in:
nora 2023-12-03 16:22:39 +01:00
parent 2ed587b9d1
commit adc39acadc
8 changed files with 36 additions and 150 deletions
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16
2023/day03/src/p2bytes.rs
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@ -50,7 +50,7 @@ pub fn part2(input: &str) -> u64 {
let mut prev2 = empty_border.as_str();
let mut prev1 = input.lines().next().unwrap();
let mut gears: FxHashMap<u32, GearRatio> =
let mut gears: FxHashMap<u64, GearRatio> =
FxHashMap::with_capacity_and_hasher(1000, BuildHasherDefault::default());
for (line_number, next) in input
@ -59,6 +59,7 @@ pub fn part2(input: &str) -> u64 {
.chain(Some(empty_border.as_str()))
.enumerate()
{
assert!(line_number < u32::MAX as _);
let mut numbers = prev1.bytes().enumerate().peekable();
while let Some((start, c)) = numbers.next() {
if c.is_ascii_digit() {
@ -70,26 +71,23 @@ pub fn part2(input: &str) -> u64 {
let box_bounds = (start.saturating_sub(1))..std::cmp::min(end + 2, len);
let number = prev1[start..=end].parse::<u64>().unwrap();
let mut push = |key: (usize, usize)| {
let mut push = |line, pos| {
gears
.entry(((key.1 as u32) << 16) | (key.0 as u32))
.entry((((box_bounds.start + pos) as u64) << 32) | (line as u64))
.or_default()
.push(number)
};
if let Some(position) = contains_gear(&prev2[box_bounds.clone()]) {
let key = (line_number - 1, box_bounds.start + position);
push(key);
push(line_number - 1, position);
}
if let Some(position) = contains_gear(&prev1[box_bounds.clone()]) {
let key = (line_number, box_bounds.start + position);
push(key);
push(line_number, position);
}
if let Some(position) = contains_gear(&next[box_bounds.clone()]) {
let key = (line_number + 1, box_bounds.start + position);
push(key);
push(line_number + 1, position);
}
}
}