From c34b3109bb6d7bc40208428d6afa031227186911 Mon Sep 17 00:00:00 2001 From: Santo Cariotti Date: Thu, 7 Dec 2023 21:16:29 +0100 Subject: add day7 (+ day7 pt.2) Two crates because i did not want to fix the `from_str` --- 2023/day7_2/Cargo.toml | 8 + 2023/day7_2/example.txt | 5 + 2023/day7_2/input.txt | 1000 +++++++++++++++++++++++++++++++++++++++++++++++ 2023/day7_2/src/lib.rs | 189 +++++++++ 4 files changed, 1202 insertions(+) create mode 100644 2023/day7_2/Cargo.toml create mode 100644 2023/day7_2/example.txt create mode 100644 2023/day7_2/input.txt create mode 100644 2023/day7_2/src/lib.rs (limited to '2023/day7_2') diff --git a/2023/day7_2/Cargo.toml b/2023/day7_2/Cargo.toml new file mode 100644 index 0000000..4f1e5ad --- /dev/null +++ b/2023/day7_2/Cargo.toml @@ -0,0 +1,8 @@ +[package] +name = "day7_2" +version = "0.1.0" +edition = "2021" + +# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html + +[dependencies] diff --git a/2023/day7_2/example.txt b/2023/day7_2/example.txt new file mode 100644 index 0000000..e3500c3 --- /dev/null +++ b/2023/day7_2/example.txt @@ -0,0 +1,5 @@ +32T3K 765 +T55J5 684 +KK677 28 +KTJJT 220 +QQQJA 483 diff --git a/2023/day7_2/input.txt b/2023/day7_2/input.txt new file mode 100644 index 0000000..a39a921 --- /dev/null +++ b/2023/day7_2/input.txt @@ -0,0 +1,1000 @@ +4KTJ4 575 +38T4K 449 +4T437 860 +55954 240 +Q8K89 150 +85838 21 +68668 464 +JQT77 737 +99497 155 +A444A 653 +AA6QQ 28 +4Q39T 332 +8Q579 835 +58JQ5 397 +KJ77A 271 +88Q8T 365 +AATAJ 30 +3T582 325 +Q8AQQ 321 +KA6J4 215 +KA322 403 +54225 219 +4ATA4 225 +4222A 543 +2J9KK 749 +477AT 561 +6J699 880 +J4348 655 +K4444 175 +775AA 567 +J8AK6 334 +93A58 307 +JT43J 872 +A6662 929 +Q74JK 779 +AQAQQ 827 +55557 902 +6JAA6 512 +676T2 763 +QA3KK 181 +99939 377 +43T44 473 +AK48A 968 +44464 897 +7A454 475 +6JJQ8 496 +5KAKK 419 +77AKT 802 +K4K4K 719 +33739 959 +325K2 534 +93979 751 +QK9AK 290 +8J887 79 +8QKQK 203 +Q657Q 328 +23647 869 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+AJKJK 322 +6TT84 539 +757J7 437 +6T666 718 +TA2QA 476 +23327 241 +44225 510 +949A9 571 +399Q9 97 +J97J9 391 +9AA5A 664 +89599 288 +3JA4T 87 +T3869 151 +9A599 88 +8K884 465 +KTKKJ 973 +78K65 506 +AAAA9 407 +22322 553 +KQ752 54 +KKK55 136 +8K76K 604 +555TK 266 +49K3A 497 +8JJJJ 769 diff --git a/2023/day7_2/src/lib.rs b/2023/day7_2/src/lib.rs new file mode 100644 index 0000000..2651e98 --- /dev/null +++ b/2023/day7_2/src/lib.rs @@ -0,0 +1,189 @@ +use std::{collections::HashMap, str::FromStr}; + +#[derive(Debug, PartialEq, PartialOrd, Eq, Hash)] +enum HandType { + Five, + Four, + Full, + Three, + Two, + One, + High, +} + +#[derive(Debug)] +struct Play { + hand: Vec, + bid: u32, + hand_type: HandType, +} + +#[derive(Debug)] +struct PlayError; + +impl FromStr for Play { + type Err = PlayError; + + fn from_str(s: &str) -> Result { + if !s.contains(' ') { + return Err(PlayError); + } + + let s: Vec = s.split(' ').map(|x| x.to_string()).collect(); + if s.len() != 2 { + return Err(PlayError); + } + + let mut diffcards: HashMap = HashMap::new(); + let hand = s[0].chars().collect::>(); + + for ch in &hand { + if diffcards.contains_key(&ch) { + *(diffcards.get_mut(ch).unwrap()) += 1; + } else { + diffcards.insert(*ch, 1); + } + } + + let card_points: HashMap = HashMap::from([ + ('A', 13), + ('K', 12), + ('Q', 11), + ('T', 9), + ('9', 8), + ('8', 7), + ('7', 6), + ('6', 5), + ('5', 4), + ('4', 3), + ('3', 2), + ('2', 1), + ('J', 0), + ]); + let hand: Vec<_> = hand.iter().map(|x| *card_points.get(&x).unwrap()).collect(); + let jokers = hand.iter().filter(|&n| *n == 0).count(); + let b: Vec = diffcards.clone().into_values().collect(); + let max_labels: u32 = *b.iter().max().unwrap(); + + let mut hand_type: HandType = match diffcards.keys().len() { + 1 => HandType::Five, + 2 if max_labels == 4 => HandType::Four, + 2 if max_labels == 3 => HandType::Full, + 3 if max_labels == 3 => HandType::Three, + 3 => HandType::Two, + 4 => HandType::One, + 5 => HandType::High, + _ => panic!("wtf is this?"), + }; + + match jokers { + 1 => { + hand_type = match hand_type { + HandType::High => HandType::One, + HandType::One => HandType::Three, + HandType::Two => HandType::Full, + HandType::Three => HandType::Four, + HandType::Four => HandType::Five, + _ => panic!("wtf is this?"), + } + } + 2 => { + hand_type = match hand_type { + HandType::One => HandType::Three, + HandType::Two => HandType::Four, + HandType::Full => HandType::Five, + _ => panic!("wtf is this?"), + } + } + 3 => { + hand_type = match hand_type { + HandType::High => HandType::Three, + HandType::One => HandType::Four, + HandType::Two => HandType::Five, + HandType::Three => HandType::Four, + HandType::Full => HandType::Five, + _ => panic!("wtf is this?"), + } + } + 4 => { + hand_type = HandType::Five; + } + 0 | 5 => {} + _ => panic!("wtf is this?"), + }; + + Ok(Play { + hand, + bid: s[1].parse::().unwrap(), + hand_type, + }) + } +} + +pub fn part2(input: &str) -> u32 { + let mut res: u32 = 0; + + let plays: Vec<_> = input + .trim_end() + .split('\n') + .map(|x| x.parse::().unwrap()) + .collect(); + + let mut hs: HashMap> = HashMap::from([ + (HandType::Five, vec![]), + (HandType::Four, vec![]), + (HandType::Full, vec![]), + (HandType::Three, vec![]), + (HandType::Two, vec![]), + (HandType::One, vec![]), + (HandType::High, vec![]), + ]); + + for play in plays { + if let Some(p) = hs.get_mut(&play.hand_type) { + p.push(play); + } + } + + let mut rank = 1; + + for kind in [ + HandType::High, + HandType::One, + HandType::Two, + HandType::Three, + HandType::Full, + HandType::Four, + HandType::Five, + ] { + hs.get_mut(&kind) + .unwrap() + .sort_by(|a, b| a.hand.partial_cmp(&b.hand).unwrap()); + + for h in hs.get(&kind).unwrap() { + res += rank * h.bid; + rank += 1; + } + } + + res +} + +#[cfg(test)] +mod tests { + use super::*; + + #[test] + fn example_part2() { + let input = include_str!("../example.txt"); + let result = part2(input); + assert_eq!(result, 5905); + } + + #[test] + fn input_part2() { + let input = include_str!("../input.txt"); + let result = part2(input); + assert_eq!(result, 247885995); + } +} -- cgit v1.2.3-18-g5258