bwc9876.dev
Advent of Code solutions
Day 11: go-go gadget 'a
+16
-12
years/2025/src/day_11.rs
+16
-12
years/2025/src/day_11.rs
···
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5
pub struct Day11;
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6
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type Graph = HashMap<String, Vec<String>>;
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-
type Seen = HashMap<(String, bool, bool), usize>;
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+
type Seen<'a> = HashMap<(&'a String, bool, bool), usize>;
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9
10
-
fn all_paths_to_out(node: &String, graph: &Graph, seen: &mut HashMap<String, usize>) -> usize {
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-
if let Some(memo) = seen.get(node).copied() {
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-
memo
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+
fn all_paths_to_out<'a>(
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+
node: &'a String,
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+
graph: &'a Graph,
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seen: &mut HashMap<&'a String, usize>,
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+
) -> usize {
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+
if let Some(memo) = seen.get(&node) {
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+
*memo
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} else if let Some(nexts) = graph.get(node) {
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let mut amnt = 0;
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for next in nexts.iter() {
···
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amnt += all_paths_to_out(next, graph, seen);
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}
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}
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-
seen.insert(node.clone(), amnt);
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+
seen.insert(node, amnt);
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amnt
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} else {
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0
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}
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}
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-
fn all_paths_to_out_with_constraints(
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node: &String,
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+
fn all_paths_to_out_with_constraints<'a>(
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+
node: &'a String,
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saw_dac: bool,
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saw_fft: bool,
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-
graph: &Graph,
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-
seen: &mut Seen,
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+
graph: &'a Graph,
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+
seen: &mut Seen<'a>,
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) -> usize {
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-
if let Some(memo) = seen.get(&(node.clone(), saw_dac, saw_fft)).copied() {
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memo
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+
if let Some(memo) = seen.get(&(node, saw_dac, saw_fft)) {
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+
*memo
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} else if let Some(nexts) = graph.get(node) {
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let mut amnt = 0;
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for next in nexts.iter() {
···
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);
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}
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}
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-
seen.insert((node.clone(), saw_dac, saw_fft), amnt);
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+
seen.insert((node, saw_dac, saw_fft), amnt);
56
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amnt
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} else {
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0