diff --git a/Cargo.lock b/Cargo.lock index 6357306..d7fb43a 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -62,6 +62,14 @@ version = "0.1.0" name = "day_6-2" version = "0.1.0" +[[package]] +name = "day_7-1" +version = "0.1.0" + +[[package]] +name = "day_7-2" +version = "0.1.0" + [[package]] name = "memchr" version = "2.6.4" diff --git a/day_7/input.txt b/day_7/input.txt new file mode 100644 index 0000000..f1d181e --- /dev/null +++ b/day_7/input.txt @@ -0,0 +1,1000 @@ +6JA22 162 +TQJQ8 732 +7T77A 882 +6K66K 850 +QQAQQ 11 +7QQ7Q 321 +28966 921 +34433 801 +8QQ8Q 914 +K63K5 636 +47777 533 +K62Q9 773 +25J52 717 +A6AAA 631 +23222 720 +267Q4 9 +K8QK5 15 +QQA22 400 +563T8 50 +2J5J2 756 +77T83 647 +T9596 27 +53AJA 371 +6J666 916 +833TK 380 +5TK4J 506 +TK3KK 794 +JTJ55 54 +TTT4T 422 +9J3KK 491 +488K4 30 +87878 654 +QQKKK 894 +A4A3J 360 +55559 232 +33388 148 +JK599 632 +KK663 300 +JJ448 514 +AKATA 188 +6J537 885 +98888 65 +9TT3J 361 +668A9 227 +Q3285 257 +JT54J 208 +K8QA7 373 +77K39 681 +33T4J 281 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letter_strength(letter: &char) -> i32 { + let chars: [char; 13] = ['A', 'K', 'Q', 'J', 'T', '9', '8', '7', '6', '5', '4', '3', '2']; + return chars.iter().position(|i| i == letter).unwrap() as i32; +} + +fn hand_type(hand: &str) -> i32 { + let mut chars: HashMap = HashMap::new(); + + for c in hand.chars() { + if !chars.contains_key(&c) { + chars.insert(c, 1); + } else { + chars.insert(c, chars[&c] + 1); + } + } + + let mut order: Vec = chars.clone().into_iter().map(|(_, v)| v).collect(); + order.sort_by(|a, b| b.cmp(a)); + + if chars.len() == 1 { + 6 + } else if chars.len() == 2 { + if order[0] == 4 { + 5 + } else if order[0] == 3 { + 4 + } else { + panic!(); + } + } else if chars.len() == 3 { + if order[0] == 3 { + 3 + } else if order[0] == 2 && order[1] == 2 { + 2 + } else { + panic!(); + } + } else if chars.len() == 4 { + 1 + } else if chars.len() == 5 { + 0 + } else { + panic!(); + } +} + +fn main() { + let input = include_str!("../../input.txt"); + let mut lines: Vec = Vec::new(); + + for line in input.lines() { + let mut split = line.split(" "); + lines.push(InputLine { + hand: String::from(split.next().unwrap()), + bid: split.next().unwrap().parse::().unwrap(), + }); + } + + lines.sort_by(|a, b| { + let type_a = hand_type(a.hand.as_str()); + let type_b = hand_type(b.hand.as_str()); + + if type_a != type_b { + return type_a.cmp(&type_b); + } else { + for i in 0..5 { + let val_a = letter_strength(&a.hand.chars().nth(i).unwrap()); + let val_b = letter_strength(&b.hand.chars().nth(i).unwrap()); + + if val_a != val_b { + return val_b.cmp(&val_a); + } + } + } + + panic!(); + }); + + let mut result = 0; + + for (i, line) in lines.iter().enumerate() { + result += (i as i32 + 1) * line.bid; + } + + println!("Result: {}", result); +} diff --git a/day_7/part_2/Cargo.toml b/day_7/part_2/Cargo.toml new file mode 100644 index 0000000..6e22278 --- /dev/null +++ b/day_7/part_2/Cargo.toml @@ -0,0 +1,8 @@ +[package] +name = "day_7-2" +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/day_7/part_2/src/main.rs b/day_7/part_2/src/main.rs new file mode 100644 index 0000000..177d3c1 --- /dev/null +++ b/day_7/part_2/src/main.rs @@ -0,0 +1,129 @@ +use std::collections::HashMap; + +struct InputLine { + hand: String, + bid: i32, +} + +fn letter_strength(letter: &char) -> i32 { + let chars: [char; 13] = ['A', 'K', 'Q', 'T', '9', '8', '7', '6', '5', '4', '3', '2', 'J']; + return chars.iter().position(|i| i == letter).unwrap() as i32; +} + +fn hand_type(input_hand: &str) -> i32 { + fn rank_hand(hand: &str) -> i32 { + let mut chars: HashMap = HashMap::new(); + + for c in hand.chars() { + if !chars.contains_key(&c) { + chars.insert(c, 1); + } else { + chars.insert(c, chars[&c] + 1); + } + } + + let mut order: Vec = chars.clone().into_iter().map(|(_, v)| v).collect(); + order.sort_by(|a, b| b.cmp(a)); + + if chars.len() == 1 { + 6 + } else if chars.len() == 2 { + if order[0] == 4 { + 5 + } else if order[0] == 3 { + 4 + } else { + panic!(); + } + } else if chars.len() == 3 { + if order[0] == 3 { + 3 + } else if order[0] == 2 && order[1] == 2 { + 2 + } else { + panic!(); + } + } else if chars.len() == 4 { + 1 + } else if chars.len() == 5 { + 0 + } else { + panic!(); + } + } + + let mut hand = String::from(input_hand); + + for i in 0..5 { + let mut options: Vec = Vec::new(); + let c = hand.chars().nth(i).unwrap(); + + if c == 'J' { + let avail: [char; 12] = ['A', 'K', 'Q', 'T', '9', '8', '7', '6', '5', '4', '3', '2']; + for c in avail { + options.push(c); + } + } else { + options.push(c); + } + + let mut highest_char: char = c; + let mut highest_val: i32 = 0; + + for c in options { + let mut tmp_hand = hand.clone(); + tmp_hand.replace_range(i..=i, c.to_string().as_str()); + let val = rank_hand(&tmp_hand.as_str()); + + if val > highest_val { + highest_val = val; + highest_char = c; + } + } + + hand.replace_range(i..=i, highest_char.to_string().as_str()); + } + + return rank_hand(hand.as_str()); +} + +fn main() { + let input = include_str!("../../input.txt"); + let mut lines: Vec = Vec::new(); + + for line in input.lines() { + let mut split = line.split(" "); + lines.push(InputLine { + hand: String::from(split.next().unwrap()), + bid: split.next().unwrap().parse::().unwrap(), + }); + } + + lines.sort_by(|a, b| { + let type_a = hand_type(a.hand.as_str()); + let type_b = hand_type(b.hand.as_str()); + + if type_a != type_b { + return type_a.cmp(&type_b); + } else { + for i in 0..5 { + let val_a = letter_strength(&a.hand.chars().nth(i).unwrap()); + let val_b = letter_strength(&b.hand.chars().nth(i).unwrap()); + + if val_a != val_b { + return val_b.cmp(&val_a); + } + } + } + + panic!(); + }); + + let mut result = 0; + + for (i, line) in lines.iter().enumerate() { + result += (i as i32 + 1) * line.bid; + } + + println!("Result: {}", result); +}