55 lines
2 KiB
Rust
55 lines
2 KiB
Rust
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use std::ops::Range;
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const INPUT: &str = include_str!("input.txt");
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const GRID_WIDTH: i64 = 101;
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const GRID_HEIGHT: i64 = 103;
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const SECONDS: i64 = 100;
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const QUADRANT_1: (Range<i64>, Range<i64>) = (0..(GRID_WIDTH/2), 0..(GRID_HEIGHT/2));
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const QUADRANT_2: (Range<i64>, Range<i64>) = ((GRID_WIDTH/2 + 1)..GRID_WIDTH, 0..(GRID_HEIGHT/2));
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const QUADRANT_3: (Range<i64>, Range<i64>) = ((GRID_WIDTH/2 + 1)..GRID_WIDTH, (GRID_HEIGHT/2 + 1)..GRID_HEIGHT);
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const QUADRANT_4: (Range<i64>, Range<i64>) = (0..(GRID_WIDTH/2), (GRID_HEIGHT/2 + 1)..GRID_HEIGHT);
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#[derive(Debug)]
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pub struct Robot {
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pub position: (i64, i64),
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pub velocity: (i64, i64),
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}
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fn main() {
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let robots = INPUT
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.lines()
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.map(|l| l.split_once(" v=").unwrap())
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.map(|(p, v)| {
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(
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p.trim_start_matches("p=").split_once(",").unwrap(),
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v.split_once(",").unwrap(),
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)
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})
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.map(|(p, v)| Robot {
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position: (p.0.parse().unwrap(), p.1.parse().unwrap()),
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velocity: (v.0.parse().unwrap(), v.1.parse().unwrap()),
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});
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let mut quadrants = (0u64, 0u64, 0u64, 0u64);
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for mut robot in robots {
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robot.position = (
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((robot.position.0 + robot.velocity.0 * SECONDS)).rem_euclid(GRID_WIDTH),
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((robot.position.1 + robot.velocity.1 * SECONDS)).rem_euclid(GRID_HEIGHT),
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);
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if QUADRANT_1.0.contains(&robot.position.0) && QUADRANT_1.1.contains(&robot.position.1) {
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quadrants.0 += 1;
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} else if QUADRANT_2.0.contains(&robot.position.0) && QUADRANT_2.1.contains(&robot.position.1) {
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quadrants.1 += 1;
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} else if QUADRANT_3.0.contains(&robot.position.0) && QUADRANT_3.1.contains(&robot.position.1) {
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quadrants.2 += 1;
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} else if QUADRANT_4.0.contains(&robot.position.0) && QUADRANT_4.1.contains(&robot.position.1) {
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quadrants.3 += 1;
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}
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}
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println!("Result: {}", quadrants.0 * quadrants.1 * quadrants.2 * quadrants.3);
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}
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