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1
data/quest-1-part-2.txt
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ABxDDDACACDADABCCADxABBDBACADDDBCCDBBBDBBABCDCADADBABAAADACAxDACCABBxCxDDCBDBCDBDxBCDBBDBCxCDCDBBBxxBDCABADDAADCBDCDADCDDBDCCxCCADADDADxDDDCDxDACCCCADCCxADBxxDCDDBBBBCABDCCBACCCxDCDACBCDCBAxBBADACDCBDxCABCCDxBxCDCABCBADxCCDDCxCBDABCACBDxDADxAxACBABCCDCxDDBBBABCABCADDCBCDADDBADBBCxBCCDCBBCCAADDCBCDBAAABxBCCCxxDDADCBACACCBBCCCDCBBCDBDACxBDBBxDCCAACDBDACDBBxxBDCxDBCACACDABBBDDDxxBDxDACBAABCBACBDDBBBxDCDBBABDAACCCDDDABAACACxDCBAAABxDBAxBAAABDxADxBABBDADBCADBAACCBBBABxCxDCADDxCADDACDCABBCAADBBDCCACADDBDACACBADABAxCBAAABDBBACBACDCAADDDBDACCBxBxBCDDADCCCADAxBADDxACDDxxxDACxCBAAxCDBDDABCCBDABxABAACBDDCAADDCCAABDBAABxCABDBCCACBBADBDBAAADBDBCBDDBDDxADxDBBxBCBABCACACACABxCBBBBxCAAABCBDDDBBDCCxBCxABCBDCACDAADABDBBABACCDAxAxAACDxCDDAAxAAABCACAABDDCxDBADCCCBACxxxACBBBDACDACDxADAAAAACADDBDADCDCxxCBBAADxCDDDCCCDDxxDACAACDDDCDACxAxDCxCADADCCACDxDBBCACDxDCBCAAxBAABCBBxADDDCADDBADDAACBDCDADBDDCDBADCDBCACCBxBDAAABxCDBDCAAAAxDDCCDDBCCADABAABxCDBDxDCCCCBCCDCBxADABCxACDAxDCDxADBAACxACDxCADxBBBBCDCCABADxBCABBBBxBADADxADDAAAACBADxDBxxACBDxBDAxCCCCACxBDDDCBDxCCACCCAABBBCACxCxDDxDDxADAADBABABAxxCCCAAACCCDABABADCBBxxCBBADABxxCxDDBBxAxCCBAACABxAABxBAAADDxDDBDCDDCBCDCCCxDCCCAxAxACAADDACBBxBBCBxADDBDBAABBDBBDDDCBCCBABAABABDCAxADAxCDBBCADBxBABDDBCBxDDABADDCBDBCBDxBDDBxADDDCxBCDADxxDDDCCCDCBDCDADDDBADCDDCBxDBDxCBxAACBCBDBCDBCDDBCxACDBABAxAABABDADxBACDADBBDACCDADDBBBCCABDCDCDABADAxCDAxBBDCACACDBCCDCDABDAADCCDBCCCDCABABxCCDACBBxCxCDBBCBCDCBDDDADCxBABxCABDxBCxBxACDxAAAAxxABAAxCCAxCBDABxBBxxCCBCCxAACBCACBDxxADABCDCCCCCBBAxCDDDBCDDDCDACADDADBBCBDCAAADDxBCCCDABAxDCBBBCADCDBCBAADBBADBDDCDACCABBxADxDBACACBCCADDCBACCCCBCBBACBDDCAADCCBCBCAACAxBBCBACABABDCAADBxCDBDCADCCDABACDxBADACACxDDDCBCBBDCAxCBACCCBBDCBCDxBDAABDDCDCDBBBBACBCDAxDDAAACABACDACBBCDDDAABxCCBBCABCABCxDACCBBDACDDDxABDBACBDBADDBBBDAxAAABBxCBDBCAxDCBCCABCCBBCDxCCABBCBACABCCxCCCxADBDBDCACBDxBACDADBDCCBDDCCCxCCCCDDDDDBCCDBCBDCxDACAACxADCDDACCDDCBACCDDACACAACCDBABBBCCAAxDADxxACBAABAABCDABAxDCDABCCCCCBDDCxxBCBBxDDADBCCDCACBACDACCADDAxxBCDDDBDCCADxCCAx

1
data/quest-1-part-3.txt
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60
src/bin/quest-1-part-2.rs
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use std::{collections::HashMap, path::PathBuf};
type Result<T> = std::result::Result<T, Box<dyn std::error::Error>>;
fn main() -> Result<()> {
let file_path = PathBuf::from("./data/quest-1-part-2.txt");
let data = std::fs::read_to_string(file_path)?;
let counter = quest_part_2(&data);
println!("Quest 1 / Part 2: {counter}");
Ok(())
}
fn quest_part_2(data: &str) -> i32 {
let table = HashMap::from([('A', 0), ('B', 1), ('C', 3), ('D', 5)]);
let mut counter = 0;
let mut is_left = false;
let mut has_left_contender = false;
let mut left_score: i32 = 0;
for beast in data.chars() {
is_left = !is_left;
match (is_left, table.get(&beast)) {
(true, None) => {
// left has no contender
left_score = 0;
has_left_contender = false;
}
(true, Some(score)) => {
left_score = *score;
has_left_contender = true;
}
(false, None) => {
// right has no container
counter += left_score;
}
(false, Some(score)) if has_left_contender => {
// has both left and right contender
counter += left_score + score + 2;
}
(false, Some(score)) => {
// has only right contender
counter += score;
}
}
}
counter
}
#[cfg(test)]
mod tests {
use super::quest_part_2;
#[test]
fn sample() {
let data = "AxBCDDCAxD";
let result = quest_part_2(data);
assert_ne!(result, 5835);
assert_eq!(result, 28);
}
}

88
src/bin/quest-1-part-3.rs
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use std::{collections::HashMap, path::PathBuf};
type Result<T> = std::result::Result<T, Box<dyn std::error::Error>>;
fn main() -> Result<()> {
let file_path = PathBuf::from("./data/quest-1-part-3.txt");
let data = std::fs::read_to_string(file_path)?;
let counter = quest_part_3(&data);
println!("Quest 1 / Part 3: {counter}");
Ok(())
}
#[derive(PartialEq, Eq)]
enum Position {
Left,
Middle,
Right,
}
#[derive(Debug, Default)]
struct Fight {
left: i32,
middle: i32,
right: i32,
combatants: i32,
}
fn quest_part_3(data: &str) -> i32 {
let table = HashMap::from([('A', 0), ('B', 1), ('C', 3), ('D', 5)]);
let mut counter = 0;
let mut position = Position::Left;
let mut fight = Fight::default();
for beast in data.chars() {
match (&position, table.get(&beast)) {
(Position::Left, None) => {
fight.left = 0;
fight.combatants = 0;
}
(Position::Left, Some(score)) => {
fight.left = *score;
fight.combatants = 1;
}
(Position::Middle, None) => {
fight.middle = 0;
}
(Position::Middle, Some(score)) => {
fight.middle = *score;
fight.combatants += 1;
}
(Position::Right, None) => {
fight.right = 0;
}
(Position::Right, Some(score)) => {
fight.right = *score;
fight.combatants += 1;
}
}
if position == Position::Right {
let score = fight.left + fight.middle + fight.right;
let bonus = match fight.combatants {
3 => 6, // two per combatant
2 => 2, // one per combatant
1 => 0, // no bonus
_ => 0, // fail-safe
};
counter += score + bonus;
println!("{fight:?} - {score} - {bonus} -> {} --> {counter}", score + bonus);
}
position = match &position {
Position::Left => Position::Middle,
Position::Middle => Position::Right,
Position::Right => Position::Left,
}
}
counter
}
#[cfg(test)]
mod tests {
use super::quest_part_3;
#[test]
fn sample() {
let data = "xBxAAABCDxCC";
let result = quest_part_3(data);
assert_eq!(result, 30);
}
}