Optimized Day 2

This commit is contained in:
Brandon Scott 2022-12-09 02:32:57 -06:00
parent bbf346ba41
commit 6992a9f3d7
1 changed files with 27 additions and 48 deletions

View File

@ -1,6 +1,6 @@
use std::fs::File;
use std::io::BufReader;
use std::io::BufRead;
use std::io::BufReader;
pub fn run() {
let file = File::open("resources/day2input.txt").expect("Input file not found.");
@ -11,61 +11,40 @@ pub fn run() {
for line in reader.lines() {
let str = line.unwrap();
let input_arguments = str.split(" ").collect::<Vec<&str>>();
println!("Round: {:?}, {:?}", input_arguments[0], input_arguments[1]);
let instruction_a = input_arguments[0].chars().next().unwrap();
let instruction_b = input_arguments[1].chars().next().unwrap();
if instruction_b == 'X' {
part1_score += check_outcome(instruction_b, instruction_a) + get_shape_value(instruction_b); // rock
part2_score += get_shape_value(get_losing_move(instruction_a)); // lose
} else if instruction_b == 'Y' {
part1_score += check_outcome(instruction_b, instruction_a) + get_shape_value(instruction_b); // paper
part2_score += 3 + get_shape_value(instruction_a); // draw
} else if instruction_b == 'Z' {
part1_score += check_outcome(instruction_b, instruction_a) + get_shape_value(instruction_b); // scissors
part2_score += 6 + get_shape_value(get_winning_move(instruction_a)); // win
}
part1_score += calculate_score_part1(&str);
part2_score += calculate_score_part2(&str);
}
println!("Day 2 Part 1 Answer: {:?}", part1_score);
println!("Day 2 Part 2 Answer: {:?}", part2_score);
}
fn get_shape_value(shape: char) -> u32 {
return match shape {
'X' | 'A' => 1, // rock
'Y' | 'B' => 2, // paper
'Z' | 'C' => 3, // scissor
fn calculate_score_part1(game: &str) -> u32 {
return match &game[..] {
"A X" => 3 + 1,
"A Y" => 6 + 2,
"A Z" => 0 + 3,
"B X" => 0 + 1,
"B Y" => 3 + 2,
"B Z" => 6 + 3,
"C X" => 6 + 1,
"C Y" => 0 + 2,
"C Z" => 3 + 3,
_ => panic!()
}
};
}
fn get_losing_move(shape: char) -> char {
return match shape {
'X' | 'A' => 'C', // rock
'Y' | 'B' => 'A', // paper
'Z' | 'C' => 'B', // scissor
fn calculate_score_part2(game: &str) -> u32 {
return match &game[..] {
"A X" => 3 + 0, // lose
"A Y" => 1 + 3, // draw
"A Z" => 2 + 6, // win
"B X" => 1 + 0, // lose
"B Y" => 2 + 3, // draw
"B Z" => 3 + 6, // win
"C X" => 2 + 0, // lose
"C Y" => 3 + 3, // draw
"C Z" => 1 + 6, // win
_ => panic!()
}
}
fn get_winning_move(shape: char) -> char {
return match shape {
'X' | 'A' => 'B', // rock
'Y' | 'B' => 'C', // paper
'Z' | 'C' => 'A', // scissor
_ => panic!()
}
}
fn check_outcome(a: char, b: char) -> u32 {
if get_shape_value(a) == get_shape_value(b) {
return 3;
} else if get_losing_move(a) == b {
return 6;
}
return 0;
};
}