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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,48 @@ | ||
| #![feature(test)] | ||
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| use rayon::iter::{IntoParallelRefIterator, ParallelIterator}; | ||
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| #[derive(Debug)] | ||
| struct Input { | ||
| patterns: Vec<String>, | ||
| designs: Vec<String>, | ||
| } | ||
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| fn setup(input: &str) -> Input { | ||
| let mut lines = input.trim().lines(); | ||
| let patterns = lines.next().unwrap().split(", ").map(Into::into).collect(); | ||
| let designs = lines.skip(1).map(Into::into).collect(); | ||
| Input { patterns, designs } | ||
| } | ||
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| fn count(design: &str, patterns: &[String]) -> usize { | ||
| let mut dp = vec![0; design.len() + 1]; | ||
| dp[design.len()] = 1; | ||
| for i in (0..design.len()).rev() { | ||
| for p in patterns { | ||
| if i + p.len() > design.len() || !design[i..].starts_with(p) { | ||
| continue; | ||
| } | ||
| dp[i] += dp[i + p.len()]; | ||
| } | ||
| } | ||
| dp[0] | ||
| } | ||
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| fn part1(input: &Input) -> usize { | ||
| input | ||
| .designs | ||
| .par_iter() | ||
| .map(|d| count(d, &input.patterns).min(1)) | ||
| .sum() | ||
| } | ||
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| fn part2(input: &Input) -> usize { | ||
| input | ||
| .designs | ||
| .par_iter() | ||
| .map(|d| count(d, &input.patterns)) | ||
| .sum() | ||
| } | ||
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| aoc::main!(2024, 19, ex: 1); |
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@@ -17,7 +17,7 @@ aoc::year! { | |
| "16.rs", | ||
| "17.rs", | ||
| "18.rs", | ||
| // "19.rs", | ||
| "19.rs", | ||
| // "20.rs", | ||
| // "21.rs", | ||
| // "22.rs", | ||
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| Original file line number | Diff line number | Diff line change |
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@@ -414,3 +414,6 @@ path = "2024/17.rs" | |
| [[bin]] | ||
| name = "2024_18" | ||
| path = "2024/18.rs" | ||
| [[bin]] | ||
| name = "2024_19" | ||
| path = "2024/19.rs" | ||
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| @@ -0,0 +1,10 @@ | ||
| r, wr, b, g, bwu, rb, gb, br | ||
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| brwrr | ||
| bggr | ||
| gbbr | ||
| rrbgbr | ||
| ubwu | ||
| bwurrg | ||
| brgr | ||
| bbrgwb |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1 @@ | ||
| 6 |
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| 16 |