Rust Day 6

This commit is contained in:
Tobias Berger 2022-12-06 08:59:06 +01:00
parent 870d70001b
commit c785df0a3a
Signed by: toby
GPG key ID: 2D05EFAB764D6A88
11 changed files with 99 additions and 2 deletions

2
rust/Cargo.lock generated
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@ -4,4 +4,4 @@ version = 3
[[package]] [[package]]
name = "advent-of-code" name = "advent-of-code"
version = "22.5.2" version = "22.6.2"

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@ -1,6 +1,6 @@
[package] [package]
name = "advent-of-code" name = "advent-of-code"
version = "22.5.2" version = "22.6.2"
edition = "2021" edition = "2021"
resolver = "2" resolver = "2"
@ -42,3 +42,7 @@ path = "src/day04/main.rs"
[[bin]] [[bin]]
name = "day05" name = "day05"
path = "src/day05/main.rs" path = "src/day05/main.rs"
[[bin]]
name = "day06"
path = "src/day06/main.rs"

1
rust/src/day06/input.txt Normal file
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rust/src/day06/main.rs Normal file
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@ -0,0 +1,11 @@
const INPUT: &str = include_str!("input.txt");
mod part_1;
use part_1::part_1;
mod part_2;
use part_2::part_2;
pub fn main() {
println!("Part 1: {}", part_1(INPUT));
println!("Part 2: {}", part_2(INPUT));
}

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rust/src/day06/part_1.rs Normal file
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@ -0,0 +1,38 @@
const STRING_SLICE_LENGTH: usize = 4;
pub(crate) fn part_1(input: &'static str) -> usize {
for idx in 0..(input.len() - STRING_SLICE_LENGTH) {
let mut unique_chars = input[idx..idx + STRING_SLICE_LENGTH]
.chars()
.collect::<Vec<_>>();
unique_chars.sort();
unique_chars.dedup();
if unique_chars.len() == STRING_SLICE_LENGTH {
return idx + STRING_SLICE_LENGTH;
}
}
unreachable!("We should always find an answer");
}
#[cfg(test)]
mod tests {
const SAMPLES: [(&str, usize); 5] = [
(include_str!("sample_inputs/1.txt"), 7),
(include_str!("sample_inputs/2.txt"), 5),
(include_str!("sample_inputs/3.txt"), 6),
(include_str!("sample_inputs/4.txt"), 10),
(include_str!("sample_inputs/5.txt"), 11),
];
#[test]
fn test_with_solution() {
assert_eq!(super::part_1(crate::INPUT), 1723);
}
#[test]
fn test_with_sample_solution() {
for (sample_input, sample_answer) in SAMPLES {
assert_eq!(super::part_1(sample_input), sample_answer);
}
}
}

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rust/src/day06/part_2.rs Normal file
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@ -0,0 +1,38 @@
const STRING_SLICE_LENGTH: usize = 14;
pub(crate) fn part_2(input: &'static str) -> usize {
for idx in 0..(input.len() - STRING_SLICE_LENGTH) {
let mut unique_chars = input[idx..idx + STRING_SLICE_LENGTH]
.chars()
.collect::<Vec<_>>();
unique_chars.sort();
unique_chars.dedup();
if unique_chars.len() == STRING_SLICE_LENGTH {
return idx + STRING_SLICE_LENGTH;
}
}
unreachable!("We should always find an answer");
}
#[cfg(test)]
mod tests {
const SAMPLES: [(&str, usize); 5] = [
(include_str!("sample_inputs/1.txt"), 19),
(include_str!("sample_inputs/2.txt"), 23),
(include_str!("sample_inputs/3.txt"), 23),
(include_str!("sample_inputs/4.txt"), 29),
(include_str!("sample_inputs/5.txt"), 26),
];
#[test]
fn test_with_solution() {
assert_eq!(super::part_2(crate::INPUT), 3708);
}
#[test]
fn test_with_sample_solution() {
for (sample_input, sample_answer) in SAMPLES {
assert_eq!(super::part_2(sample_input), sample_answer);
}
}
}

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