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✨ Day 7: Part 2

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LeMoonStar 2024-12-08 00:15:18 +01:00
parent 0ff7e66083
commit 28e2a563c0
2 changed files with 14 additions and 15 deletions
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4
README.md
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@ -3,8 +3,8 @@
[![About](https://img.shields.io/badge/Advent%20of%20Code-2024-brightgreen?style=flat-square)](https://adventofcode.com/2024/about)
[![Language: Rust](https://img.shields.io/badge/Language-Rust-orange.svg?style=flat-square)](https://en.wikipedia.org/wiki/Rust_(programming_language))
[![License: MIT](https://img.shields.io/badge/License-MIT-blue.svg?style=flat-square)](https://mit-license.org/)
![Days completed](https://img.shields.io/badge/Days%20completed-4.5-red?style=flat-square)
![Stars](https://img.shields.io/badge/Stars-9-yellow?style=flat-square)
![Days completed](https://img.shields.io/badge/Days%20completed-5%20%2B%202%20half-red?style=flat-square)
![Stars](https://img.shields.io/badge/Stars-12-yellow?style=flat-square)
> ⚠️ This README is copied from my previous years solution. It is not fully adopted to 2024 yet.

19
src/days/d07.rs
View file

@ -6,6 +6,7 @@ const CURRENT_DAY: u8 = 7;
enum Operator {
Add,
Multiply,
Concat,
}
impl Operator {
@ -13,6 +14,7 @@ impl Operator {
match self {
Operator::Multiply => a * b,
Operator::Add => a + b,
Operator::Concat => format!("{}{}", a, b).parse().unwrap(),
}
}
}
@ -84,11 +86,8 @@ impl CalibrationEquation {
value
}
fn can_be_valid(&self) -> bool {
CombinationIterator::new(
&[Operator::Add, Operator::Multiply],
(self.parts.len() - 1) as u32,
)
fn can_be_valid(&self, operations: &[Operator]) -> bool {
CombinationIterator::new(operations, (self.parts.len() - 1) as u32)
.map(|o| self.calculate(o))
.collect::<Vec<_>>()
.contains(&self.result)
@ -116,10 +115,10 @@ pub struct Calibrator {
}
impl Calibrator {
pub fn get_valid_sum(&self) -> u64 {
fn get_valid_sum(&self, operators: &[Operator]) -> u64 {
self.equations
.iter()
.filter(|v| v.can_be_valid())
.filter(|v| v.can_be_valid(operators))
.map(|v| v.result)
.sum()
}
@ -140,7 +139,7 @@ impl DayImpl<Data> for Day<CURRENT_DAY> {
}
fn expected_results() -> (Answer, Answer) {
(Answer::Number(3749), Answer::Number(0))
(Answer::Number(3749), Answer::Number(11387))
}
fn init(input: &str) -> (Self, Data) {
@ -148,10 +147,10 @@ impl DayImpl<Data> for Day<CURRENT_DAY> {
}
fn one(&self, data: &mut Data) -> Answer {
Answer::Number(data.get_valid_sum())
Answer::Number(data.get_valid_sum(&[Operator::Add, Operator::Multiply]))
}
fn two(&self, data: &mut Data) -> Answer {
Answer::Number(0)
Answer::Number(data.get_valid_sum(&[Operator::Add, Operator::Multiply, Operator::Concat]))
}
}