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feat(day02): working solution

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swaits committed 2023-12-02 15:12:03 -07:00
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data/day02.dat
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Game 1: 6 green, 3 blue; 3 red, 1 green; 4 green, 3 red, 5 blue
Game 2: 2 red, 7 green; 13 green, 2 blue, 4 red; 4 green, 5 red, 1 blue; 1 blue, 9 red, 1 green
Game 3: 2 green, 3 blue, 9 red; 3 red, 2 green; 6 red, 4 blue; 6 red
Game 4: 9 red, 3 green; 3 green, 8 red, 6 blue; 12 blue, 4 green, 6 red; 4 green, 18 blue, 11 red; 9 blue, 2 green, 3 red; 14 blue, 7 red
Game 5: 1 blue, 2 green, 3 red; 16 red, 6 green; 6 green, 2 red; 9 red, 1 green
Game 6: 4 green, 7 red, 1 blue; 18 green, 6 blue, 7 red; 1 blue, 3 red, 9 green; 9 red, 19 green, 1 blue; 7 red, 9 green, 4 blue; 5 red, 5 blue, 10 green
Game 7: 16 blue, 5 green, 6 red; 1 blue, 6 red, 9 green; 6 green, 3 red, 2 blue; 2 red, 12 blue, 2 green
Game 8: 6 green, 10 red; 7 red, 6 green, 17 blue; 13 blue, 1 red
Game 9: 2 red, 4 green, 5 blue; 2 green, 5 blue; 4 green, 1 blue; 3 green, 3 red, 6 blue; 3 green
Game 10: 3 green, 5 red, 6 blue; 4 blue, 4 red, 5 green; 5 green, 9 red, 5 blue; 4 green, 6 blue, 10 red
Game 11: 1 blue, 7 red, 9 green; 1 blue, 13 red, 7 green; 5 red; 4 red, 7 green, 2 blue; 7 green, 12 red; 13 red, 2 blue, 12 green
Game 12: 4 blue, 2 red; 9 blue, 2 green, 3 red; 8 blue, 1 green, 1 red; 2 red, 3 green, 11 blue
Game 13: 6 red, 8 green, 2 blue; 6 red, 7 green; 3 green, 3 red; 2 blue; 3 red, 5 green
Game 14: 2 green, 11 blue, 1 red; 5 blue, 1 red, 1 green; 3 green, 12 blue, 2 red
Game 15: 4 blue, 6 red, 7 green; 1 red, 2 blue, 5 green; 6 red, 3 green, 8 blue; 7 green, 8 blue, 4 red
Game 16: 2 red, 16 blue; 2 green, 7 red; 15 blue, 7 red; 2 red, 3 green, 3 blue; 3 red, 1 green, 4 blue; 4 blue, 3 green
Game 17: 2 red, 3 green, 10 blue; 9 red, 4 blue, 3 green; 3 green, 11 red, 6 blue
Game 18: 1 red; 6 green, 1 red, 9 blue; 4 blue, 2 green; 6 blue, 10 green
Game 19: 2 red, 9 green; 2 red, 1 blue; 5 blue, 12 green; 5 green; 8 green, 2 red, 3 blue; 1 red, 11 green
Game 20: 3 green, 2 red, 7 blue; 1 blue, 10 green; 1 red, 14 blue, 13 green; 3 green, 19 blue, 4 red
Game 21: 8 red, 10 blue, 8 green; 2 red, 7 green, 18 blue; 4 green, 11 blue, 4 red; 5 green, 3 blue, 10 red
Game 22: 17 blue, 2 green, 2 red; 8 red, 7 blue; 1 red, 9 blue, 1 green
Game 23: 4 blue, 18 red, 4 green; 3 blue, 7 red; 11 red; 3 blue, 6 red; 19 red
Game 24: 10 red, 1 blue, 17 green; 17 green, 6 red; 14 green, 4 blue
Game 25: 4 blue, 9 green, 4 red; 3 green, 5 blue; 5 blue, 8 green; 3 green, 3 blue, 1 red; 10 green, 1 blue, 4 red; 2 green, 2 blue, 1 red
Game 26: 18 green, 3 red, 12 blue; 2 red, 7 green; 11 blue, 17 green; 12 green, 11 blue; 12 green, 4 blue, 3 red
Game 27: 1 red, 3 blue, 8 green; 15 blue, 8 red, 4 green; 6 red, 9 blue; 6 red, 12 blue, 9 green; 4 red, 7 blue, 15 green
Game 28: 1 red, 14 green; 1 blue, 11 green; 2 green; 4 red, 6 green, 1 blue
Game 29: 1 green, 13 red; 4 red, 16 green, 7 blue; 2 red, 4 blue; 12 green, 8 blue, 4 red; 2 red; 12 red, 5 green
Game 30: 3 green, 4 blue, 3 red; 5 blue, 4 green, 7 red; 5 blue, 2 green, 2 red; 3 red, 1 blue
Game 31: 1 blue, 8 green; 9 green, 2 blue, 1 red; 1 red, 2 blue
Game 32: 11 red, 5 green, 4 blue; 3 blue, 11 red, 8 green; 6 blue, 3 green, 17 red; 4 red, 7 green, 10 blue
Game 33: 6 blue, 4 red; 1 green; 1 green, 4 red, 4 blue; 1 green, 3 red, 10 blue; 10 blue, 1 red
Game 34: 2 green, 3 blue, 3 red; 4 red; 2 red, 2 blue
Game 35: 9 green, 13 blue; 13 blue, 14 red, 1 green; 11 blue, 4 red, 7 green; 5 blue, 5 red, 8 green; 4 red, 2 blue, 2 green
Game 36: 9 red, 5 blue, 8 green; 7 red, 20 blue; 6 green, 16 blue, 5 red; 12 red, 3 blue, 3 green; 3 green, 6 blue, 11 red; 11 red, 8 blue, 3 green
Game 37: 10 green, 11 red, 3 blue; 2 blue, 6 green, 11 red; 9 green, 8 red, 2 blue
Game 38: 2 red, 2 green, 4 blue; 3 red, 4 green, 3 blue; 8 green, 1 blue, 1 red; 3 red, 5 blue, 5 green
Game 39: 3 green, 17 red, 4 blue; 2 green, 20 red; 4 blue, 4 red, 5 green; 5 blue, 7 green, 7 red; 4 blue, 5 green, 16 red
Game 40: 2 green, 2 blue, 4 red; 3 blue, 16 green; 1 green, 2 blue; 1 red; 3 blue, 15 green; 13 green, 1 red, 2 blue
Game 41: 12 red, 10 blue, 9 green; 1 green, 15 red, 4 blue; 2 green, 8 blue, 12 red; 3 red, 4 green, 2 blue; 8 blue, 14 red, 10 green; 9 blue, 7 green, 6 red
Game 42: 5 red, 3 green, 6 blue; 4 blue, 6 green, 2 red; 10 blue; 3 red, 6 green, 10 blue
Game 43: 9 blue, 7 green, 1 red; 2 green, 2 red, 8 blue; 3 red, 15 blue, 11 green; 1 red, 6 blue, 1 green; 2 red, 1 blue; 1 red, 3 green, 7 blue
Game 44: 4 green, 6 red; 15 green, 6 red; 9 green, 16 red, 7 blue; 11 green, 4 blue, 12 red
Game 45: 3 blue, 6 green, 1 red; 4 green, 3 blue; 8 green, 3 blue
Game 46: 10 red, 8 blue; 12 red, 2 green, 17 blue; 17 blue, 6 red, 1 green; 18 red, 6 green, 3 blue; 16 blue, 2 green, 3 red
Game 47: 8 green, 13 red; 8 green, 8 red, 4 blue; 10 red, 3 green; 14 red, 5 green, 8 blue; 7 green, 19 red, 3 blue; 2 red, 5 green, 5 blue
Game 48: 7 green, 9 blue, 3 red; 7 blue, 1 green, 9 red; 7 green, 4 red, 1 blue; 6 green, 3 red, 1 blue
Game 49: 2 red, 3 green; 3 blue, 2 red; 4 red, 3 blue
Game 50: 3 red, 7 blue, 4 green; 2 green, 1 blue, 7 red; 4 red, 1 green, 5 blue
Game 51: 11 red, 6 green, 1 blue; 7 red, 1 blue, 9 green; 15 red, 18 green; 11 green, 1 blue, 11 red; 10 green, 14 red; 1 red, 11 green, 1 blue
Game 52: 18 blue, 1 red, 2 green; 18 blue, 3 green, 1 red; 2 green, 13 blue, 1 red
Game 53: 2 blue, 9 red, 6 green; 1 blue, 3 red; 7 red, 6 blue, 8 green; 2 red, 3 blue, 4 green; 1 green, 2 blue, 2 red
Game 54: 16 red, 4 blue; 1 green, 3 blue, 3 red; 2 green, 12 red; 2 green, 1 blue, 3 red; 10 blue, 6 red, 2 green
Game 55: 1 blue, 4 red, 1 green; 2 blue, 2 red; 13 red, 4 blue, 1 green; 4 blue, 9 red; 1 green, 1 blue, 16 red
Game 56: 12 blue, 12 green; 4 blue, 1 red, 3 green; 2 red, 12 green; 1 red, 11 green, 13 blue; 16 blue, 5 green
Game 57: 1 blue, 3 red; 10 green, 5 red; 5 green, 2 red; 1 red, 13 green
Game 58: 6 blue, 1 red, 6 green; 3 red, 9 blue; 4 red, 9 blue, 5 green; 1 green, 5 red, 7 blue
Game 59: 10 red, 3 green, 3 blue; 6 blue, 11 red, 1 green; 5 green, 10 red; 16 red, 2 blue, 4 green; 3 green, 10 red
Game 60: 2 green, 1 blue; 1 green, 1 blue, 4 red; 3 blue, 1 red, 1 green; 2 red, 2 green; 4 red
Game 61: 5 red, 1 green, 10 blue; 9 red, 10 blue; 1 red, 2 green, 4 blue; 10 blue, 2 green, 9 red; 1 red, 12 blue, 2 green
Game 62: 1 blue, 5 green; 4 blue, 12 green, 1 red; 7 blue, 3 green; 7 blue, 3 green; 3 blue, 1 green, 2 red; 7 blue, 1 red, 12 green
Game 63: 4 blue, 2 green, 5 red; 1 green, 2 red, 2 blue; 4 blue, 2 red, 2 green; 1 blue, 6 red, 2 green; 6 blue, 1 red; 1 green, 9 red, 6 blue
Game 64: 1 green; 3 green, 5 blue, 5 red; 3 red, 3 blue, 3 green; 1 green, 4 red, 6 blue; 5 red
Game 65: 2 red; 1 blue, 1 red; 7 red, 2 blue; 1 green, 4 blue, 3 red
Game 66: 3 red, 9 blue; 1 red, 6 blue, 15 green; 3 green, 3 red, 11 blue
Game 67: 2 red, 1 green, 2 blue; 6 red, 1 green; 1 blue, 1 red, 4 green
Game 68: 3 red, 1 blue; 1 green, 3 red, 2 blue; 1 green, 8 red; 2 blue, 3 red
Game 69: 5 blue, 6 red; 1 green, 15 blue, 10 red; 1 green, 2 red, 4 blue; 5 blue, 7 red; 3 red, 1 green, 11 blue
Game 70: 4 green, 2 red, 8 blue; 5 red, 3 blue; 10 green, 5 blue
Game 71: 1 red, 2 blue, 9 green; 3 red, 8 green; 1 red, 2 blue, 6 green; 3 red, 6 blue, 8 green; 6 green, 3 blue, 2 red; 3 red, 8 green, 6 blue
Game 72: 1 red, 11 green; 1 blue, 7 green, 1 red; 2 red, 12 green; 10 green, 6 red
Game 73: 9 green, 2 red; 1 blue, 3 green; 1 blue, 1 red, 7 green; 2 blue, 9 green, 4 red; 2 blue, 3 red, 8 green; 2 green, 9 red
Game 74: 2 green, 7 red; 1 green, 3 blue, 6 red; 4 green, 3 blue, 6 red; 2 green, 3 blue, 1 red; 3 red, 2 blue, 1 green
Game 75: 15 green, 2 blue; 15 green, 6 red, 2 blue; 12 green, 2 blue, 1 red
Game 76: 1 red, 9 green, 12 blue; 6 red, 12 green, 1 blue; 7 green, 2 blue, 1 red
Game 77: 11 blue, 1 red; 7 blue, 2 red, 13 green; 10 blue, 10 green; 12 blue, 3 red
Game 78: 4 green; 1 blue, 5 green; 5 green, 1 blue, 1 red
Game 79: 4 green, 7 blue, 16 red; 1 blue, 10 red, 5 green; 3 green, 4 red, 3 blue; 11 blue, 18 red, 5 green
Game 80: 1 red, 4 blue, 6 green; 14 blue, 16 red, 2 green; 2 blue, 5 red, 4 green; 2 green, 8 red; 18 red, 6 green, 2 blue; 18 red, 9 blue
Game 81: 11 red, 8 blue, 1 green; 12 blue, 2 green, 14 red; 16 red, 2 green, 6 blue; 17 red, 2 green; 3 green, 3 blue, 15 red
Game 82: 13 red, 1 blue, 6 green; 3 green, 12 red, 3 blue; 5 red, 3 green, 18 blue; 15 blue, 8 red
Game 83: 9 green, 5 blue, 5 red; 8 green, 15 blue, 7 red; 4 green, 6 red, 10 blue; 5 green, 2 red
Game 84: 2 blue, 2 green, 6 red; 2 green, 7 red, 1 blue; 3 green, 3 blue; 2 green, 3 red, 3 blue; 6 green, 4 red
Game 85: 1 blue, 3 green, 5 red; 2 green, 2 red; 4 red, 3 blue; 2 green, 3 blue, 1 red; 4 red, 2 green, 4 blue
Game 86: 6 red, 1 blue; 1 green, 16 red; 2 green, 1 red; 12 red, 1 blue
Game 87: 6 red, 12 green, 1 blue; 5 blue, 6 red, 4 green; 2 blue, 5 red, 8 green
Game 88: 3 green, 6 red, 2 blue; 3 blue, 2 green, 6 red; 1 red, 11 blue, 2 green
Game 89: 7 red, 3 blue, 9 green; 6 red, 3 blue, 15 green; 2 blue, 6 red, 12 green; 5 red, 8 green; 3 blue, 7 red, 9 green; 5 red, 7 green
Game 90: 2 green, 4 red, 19 blue; 13 blue, 4 red, 1 green; 14 blue, 8 green
Game 91: 12 green, 5 blue, 4 red; 9 green, 10 blue, 1 red; 13 green, 1 blue, 4 red; 2 red, 5 blue; 2 blue, 7 green, 2 red; 5 blue, 5 green, 3 red
Game 92: 9 red, 6 blue, 16 green; 11 green, 2 red, 7 blue; 1 green, 1 red, 3 blue; 4 green, 8 red
Game 93: 1 green, 4 blue, 8 red; 2 red, 1 green, 2 blue; 2 blue, 9 red; 1 green, 4 blue, 3 red; 3 red, 1 green, 4 blue
Game 94: 1 green, 7 red, 4 blue; 4 red, 3 blue; 16 blue, 9 red, 7 green; 9 red, 15 blue; 15 blue, 3 red, 6 green; 7 red, 10 blue, 12 green
Game 95: 5 green, 6 blue; 10 green, 9 blue; 4 blue, 8 green, 2 red; 5 blue, 5 green, 1 red
Game 96: 13 blue, 10 red, 2 green; 10 red, 2 green, 1 blue; 6 blue, 5 red, 3 green; 11 red, 3 green, 5 blue; 11 red, 2 green; 3 green, 6 blue
Game 97: 9 green, 11 red, 8 blue; 6 red, 9 blue, 2 green; 3 red, 17 blue, 1 green
Game 98: 14 blue, 3 green; 2 red, 15 blue, 3 green; 15 blue, 8 green, 1 red; 1 red, 8 green
Game 99: 2 green, 7 blue; 14 red, 1 green, 4 blue; 8 blue, 13 red, 2 green; 10 green, 7 red, 10 blue
Game 100: 5 green, 11 blue, 6 red; 5 green, 12 blue; 1 green, 14 blue, 1 red; 3 blue, 5 red, 6 green; 9 blue; 6 red
src/day02.rs
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use crate::Day;
// Register this day in our runner inventory
inventory::submit! {
Day { number: 2, run }
}
#[derive(Debug, Default)]
struct ColorCount {
id: usize,
red: usize,
green: usize,
blue: usize,
}
impl ColorCount {
fn max_by_element(&self, b: &Self) -> Self {
Self {
id: self.id,
red: self.red.max(b.red),
green: self.green.max(b.green),
blue: self.blue.max(b.blue),
}
}
fn is_possible(&self, max: &Self) -> bool {
self.red <= max.red && self.green <= max.green && self.blue <= max.blue
}
fn power(&self) -> usize {
self.red * self.green * self.blue
}
}
// takes a group like "1 blue, 2 green, 3 red" and returns a ColorCount object
fn parse_group(group: &str) -> ColorCount {
let mut color_count = ColorCount::default();
// split group in to its individual colors
for part in group.split(", ") {
// split individual color into "number color"
let mut parts = part.split_whitespace();
let number = parts.next().unwrap().parse::<usize>().unwrap();
let color = parts.next().unwrap();
match color {
"red" => color_count.red += number,
"green" => color_count.green += number,
"blue" => color_count.blue += number,
_ => unreachable!(), // This should not happen if all colors are known.
}
}
color_count
}
fn parse_game(game_text: &str) -> ColorCount {
// Split apart the "Game X:" and color groups
let mut parts = game_text.splitn(2, ": ");
// Extract the game number from the first part.
let game_number = parts
.next()
.unwrap()
.split_whitespace()
.last()
.unwrap()
.parse::<usize>()
.unwrap();
// Get the color data from the second part.
let color_data = parts.next().unwrap();
// Create initial ColorCount object with the game number
let initial = ColorCount {
id: game_number,
..Default::default()
};
// Parse the color groups and collect the maximum values found for each color
color_data
.split("; ")
.map(parse_group)
.fold(initial, |acc, x| acc.max_by_element(&x))
}
fn parse_games(games_text: &str) -> impl Iterator<Item = ColorCount> + '_ {
games_text
.lines()
.filter(|line| !line.is_empty())
.map(parse_game)
}
fn part1(input: &str) -> usize {
let max_color_count = ColorCount {
id: 0,
red: 12,
green: 13,
blue: 14,
};
// Find all the games which are <= max_color_count and sum the game ids
parse_games(input)
.filter(|x| x.is_possible(&max_color_count))
.map(|x| x.id)
.sum()
}
fn part2(input: &str) -> usize {
// Sum the (red*green*blue) for all games' maximum color counts
parse_games(input).map(|x| x.power()).sum()
}
const INPUT: &str = include_str!("../data/day02.dat");
fn run() {
println!("{}", part1(INPUT));
println!("{}", part2(INPUT));
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_part1_example() {
let input = r#"
Game 1: 3 blue, 4 red; 1 red, 2 green, 6 blue; 2 green
Game 2: 1 blue, 2 green; 3 green, 4 blue, 1 red; 1 green, 1 blue
Game 3: 8 green, 6 blue, 20 red; 5 blue, 4 red, 13 green; 5 green, 1 red
Game 4: 1 green, 3 red, 6 blue; 3 green, 6 red; 3 green, 15 blue, 14 red
Game 5: 6 red, 1 blue, 3 green; 2 blue, 1 red, 2 green
"#;
assert_eq!(part1(input), 8);
}
#[test]
fn test_part1_actual() {
assert_eq!(part1(INPUT), 2683);
}
#[test]
fn test_part2_example() {
let input = r#"
Game 1: 3 blue, 4 red; 1 red, 2 green, 6 blue; 2 green
Game 2: 1 blue, 2 green; 3 green, 4 blue, 1 red; 1 green, 1 blue
Game 3: 8 green, 6 blue, 20 red; 5 blue, 4 red, 13 green; 5 green, 1 red
Game 4: 1 green, 3 red, 6 blue; 3 green, 6 red; 3 green, 15 blue, 14 red
Game 5: 6 red, 1 blue, 3 green; 2 blue, 1 red, 2 green
"#;
assert_eq!(part2(input), 2286);
}
#[test]
fn test_part2_actual() {
assert_eq!(part2(INPUT), 49710);
}
}