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| 1 | +trait Cyclable { |
| 2 | + fn run_noop(&mut self) { |
| 3 | + self.run_cycle(); |
| 4 | + } |
| 5 | + |
| 6 | + fn run_addx(&mut self) { |
| 7 | + self.run_cycle(); |
| 8 | + self.run_cycle(); |
| 9 | + } |
| 10 | + |
| 11 | + fn run_instruction(&mut self, instruction: String); |
| 12 | + |
| 13 | + fn run_cycle(&mut self); |
| 14 | +} |
| 15 | + |
| 16 | +struct CycleState { |
| 17 | + cycle: i32, |
| 18 | + register_x: i32, |
| 19 | + signal_sum: i32 |
| 20 | +} |
| 21 | + |
| 22 | +impl CycleState { |
| 23 | + fn new() -> Self { |
| 24 | + Self{ |
| 25 | + cycle: 0, |
| 26 | + register_x: 1, |
| 27 | + signal_sum: 0 |
| 28 | + } |
| 29 | + } |
| 30 | +} |
| 31 | + |
| 32 | +impl Cyclable for CycleState { |
| 33 | + fn run_instruction(&mut self, instruction: String) { |
| 34 | + let mut instruction_segments = instruction.split(" "); |
| 35 | + |
| 36 | + match instruction_segments.next().unwrap() { |
| 37 | + "noop" => self.run_noop(), |
| 38 | + "addx" => { |
| 39 | + self.run_addx(); |
| 40 | + self.register_x += instruction_segments.next() |
| 41 | + .unwrap() |
| 42 | + .parse::<i32>() |
| 43 | + .unwrap(); |
| 44 | + } |
| 45 | + _ => {} |
| 46 | + } |
| 47 | + } |
| 48 | + |
| 49 | + fn run_cycle(&mut self) { |
| 50 | + self.cycle += 1; |
| 51 | + if self.cycle == 20 || (self.cycle - 20) % 40 == 0 { |
| 52 | + self.signal_sum += self.cycle * self.register_x; |
| 53 | + } |
| 54 | + } |
| 55 | +} |
| 56 | + |
| 57 | +struct CrtState { |
| 58 | + cycle: i32, |
| 59 | + register_x: i32, |
| 60 | + crt_image: Vec<char> |
| 61 | +} |
| 62 | + |
| 63 | +impl CrtState { |
| 64 | + fn new() -> Self { |
| 65 | + Self{ |
| 66 | + cycle: 0, |
| 67 | + register_x: 1, |
| 68 | + crt_image: vec![] |
| 69 | + } |
| 70 | + } |
| 71 | +} |
| 72 | + |
| 73 | +impl Cyclable for CrtState { |
| 74 | + fn run_instruction(&mut self, instruction: String) { |
| 75 | + let mut instruction_segments = instruction.split(" "); |
| 76 | + |
| 77 | + match instruction_segments.next().unwrap() { |
| 78 | + "noop" => self.run_noop(), |
| 79 | + "addx" => { |
| 80 | + self.run_addx(); |
| 81 | + self.register_x += instruction_segments.next() |
| 82 | + .unwrap() |
| 83 | + .parse::<i32>() |
| 84 | + .unwrap(); |
| 85 | + } |
| 86 | + _ => {} |
| 87 | + } |
| 88 | + } |
| 89 | + |
| 90 | + fn run_cycle(&mut self) { |
| 91 | + self.crt_image.push(if self.cycle >= self.register_x - 1 && self.cycle <= self.register_x + 1 { |
| 92 | + '.' |
| 93 | + } else { |
| 94 | + '#' |
| 95 | + }); |
| 96 | + self.cycle += 1; |
| 97 | + if self.cycle % 40 == 0 { |
| 98 | + self.cycle = 0; |
| 99 | + self.crt_image.push('\n'); |
| 100 | + } |
| 101 | + } |
| 102 | +} |
| 103 | + |
| 104 | +fn main() { |
| 105 | + let data = include_str!("../Day10.txt"); |
| 106 | + let processed_data = process_data(data); |
| 107 | + |
| 108 | + println!("{}", part1(&processed_data)); |
| 109 | + println!("{}", part2(&processed_data)); |
| 110 | +} |
| 111 | + |
| 112 | +fn part1(data: &Vec<String>) -> i32 { |
| 113 | + data.iter() |
| 114 | + .fold(CycleState::new(), |mut state, instruction| { |
| 115 | + state.run_instruction(instruction.to_string()); |
| 116 | + state |
| 117 | + }).signal_sum |
| 118 | +} |
| 119 | + |
| 120 | +fn part2(data: &Vec<String>) -> String { |
| 121 | + data.iter() |
| 122 | + .fold(CrtState::new(), |mut state, instruction| { |
| 123 | + state.run_instruction(instruction.to_string()); |
| 124 | + state |
| 125 | + }).crt_image.iter().collect() |
| 126 | +} |
| 127 | + |
| 128 | +fn process_data(data: &'static str) -> Vec<String> { |
| 129 | + data.replace("\r\n", "\n") |
| 130 | + .split("\n") |
| 131 | + .map(|s| s.to_string()) |
| 132 | + .collect() |
| 133 | +} |
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