An extremely wasteful BFS for Day 15.
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1
inputs/day15
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1
inputs/day15
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3,1033,1008,1033,1,1032,1005,1032,31,1008,1033,2,1032,1005,1032,58,1008,1033,3,1032,1005,1032,81,1008,1033,4,1032,1005,1032,104,99,1002,1034,1,1039,1002,1036,1,1041,1001,1035,-1,1040,1008,1038,0,1043,102,-1,1043,1032,1,1037,1032,1042,1106,0,124,1001,1034,0,1039,1002,1036,1,1041,1001,1035,1,1040,1008,1038,0,1043,1,1037,1038,1042,1106,0,124,1001,1034,-1,1039,1008,1036,0,1041,1001,1035,0,1040,102,1,1038,1043,1002,1037,1,1042,1106,0,124,1001,1034,1,1039,1008,1036,0,1041,102,1,1035,1040,1001,1038,0,1043,1002,1037,1,1042,1006,1039,217,1006,1040,217,1008,1039,40,1032,1005,1032,217,1008,1040,40,1032,1005,1032,217,1008,1039,5,1032,1006,1032,165,1008,1040,35,1032,1006,1032,165,1102,1,2,1044,1106,0,224,2,1041,1043,1032,1006,1032,179,1102,1,1,1044,1106,0,224,1,1041,1043,1032,1006,1032,217,1,1042,1043,1032,1001,1032,-1,1032,1002,1032,39,1032,1,1032,1039,1032,101,-1,1032,1032,101,252,1032,211,1007,0,38,1044,1106,0,224,1101,0,0,1044,1106,0,224,1006,1044,247,1001,1039,0,1034,1001,1040,0,1035,101,0,1041,1036,102,1,1043,1038,1002,1042,1,1037,4,1044,1106,0,0,4,26,16,55,25,8,4,99,2,21,20,20,56,26,97,81,12,2,4,9,32,7,49,54,5,18,81,16,7,88,4,23,30,66,17,31,27,29,34,26,81,62,27,81,41,84,12,53,90,79,37,22,45,27,17,39,76,1,55,58,44,20,18,57,57,20,76,47,20,44,88,26,43,36,79,12,68,30,19,71,27,21,18,75,18,9,56,29,15,84,8,74,93,1,35,91,39,32,86,9,97,54,4,22,59,13,61,31,19,97,26,82,35,73,23,77,71,59,26,76,78,73,34,85,67,26,1,66,91,79,26,95,5,75,99,29,14,23,26,8,66,97,55,21,25,49,17,99,71,37,62,21,45,46,13,29,30,24,31,63,99,12,12,63,10,64,2,76,3,8,37,94,33,12,47,65,35,65,60,12,88,8,10,49,36,12,14,4,43,82,19,16,51,52,20,17,43,18,33,49,19,93,49,29,86,10,31,92,90,44,26,97,8,63,70,81,28,17,80,23,22,79,56,33,67,61,91,37,4,83,77,16,6,8,33,66,92,46,8,34,23,81,3,93,14,23,72,20,91,16,62,79,7,27,81,10,11,44,65,24,66,77,31,12,53,15,50,84,24,70,29,62,50,5,3,88,13,52,85,42,4,15,39,82,65,18,15,58,37,71,10,13,90,98,29,59,52,3,22,13,59,91,29,23,79,1,7,24,80,79,37,31,77,17,11,64,10,9,8,74,97,6,74,35,73,44,68,29,97,3,45,73,30,28,80,9,48,73,76,7,3,77,83,8,12,41,62,44,10,21,27,74,32,95,73,4,47,71,6,67,17,57,10,67,5,25,74,18,24,57,7,61,66,4,51,14,7,44,29,79,74,11,6,49,75,32,3,98,89,63,5,15,5,74,78,37,7,77,3,13,47,9,33,76,22,47,6,72,12,35,75,39,25,87,83,37,19,91,25,45,22,30,54,83,74,22,71,19,3,3,85,74,37,95,26,67,46,10,12,96,44,50,32,90,3,28,56,24,43,4,1,65,5,9,50,22,44,88,9,48,59,21,24,54,11,35,53,28,7,82,32,24,17,45,88,34,72,95,17,9,39,29,4,55,66,95,22,62,15,71,11,39,51,37,86,49,20,10,63,31,66,59,15,55,93,3,11,28,54,30,41,20,92,7,3,12,54,49,14,33,56,89,21,26,67,20,93,7,64,3,31,60,23,51,36,30,57,20,14,28,88,4,6,69,33,65,98,35,96,80,49,25,68,78,97,30,63,35,73,89,32,64,69,10,68,96,19,89,71,41,32,31,30,90,5,71,20,53,36,51,23,87,19,25,15,34,15,48,19,25,33,14,50,64,11,96,19,34,14,44,33,29,40,16,50,90,22,34,44,17,64,63,18,86,57,29,44,22,98,16,41,20,99,34,14,51,11,4,84,91,66,27,49,6,58,34,95,62,6,45,53,27,72,4,12,40,43,17,41,93,27,30,70,31,47,87,26,64,9,63,59,73,9,11,97,35,56,73,23,58,9,49,13,88,1,87,13,54,21,94,13,69,16,39,2,10,64,13,10,19,96,2,23,1,60,99,47,12,61,37,13,70,24,48,91,7,33,51,10,25,88,33,69,29,98,16,16,60,5,29,44,17,21,41,62,65,8,61,84,27,42,78,72,23,98,16,76,98,77,37,19,49,37,93,83,97,1,63,9,63,27,66,34,74,87,58,3,90,4,48,51,67,32,66,9,56,9,44,1,67,24,49,29,58,20,70,32,73,27,82,0,0,21,21,1,10,1,0,0,0,0,0,0
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@@ -5,6 +5,7 @@ mod fuel;
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mod image;
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mod machine;
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mod orbits;
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mod repair;
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mod robot;
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mod wiremap;
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148
src/repair.rs
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148
src/repair.rs
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use crate::endchannel::{Receiver, Sender, channel};
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use crate::machine::Computer;
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use std::thread;
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#[derive(Clone, Copy, Debug, PartialEq)]
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enum Direction {
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North,
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East,
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South,
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West,
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}
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const ALL_DIRECTIONS: [Direction; 4] = [Direction::North,
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Direction::South,
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Direction::East,
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Direction::West];
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impl Direction {
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fn reverse(&self) -> Direction {
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match self {
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Direction::North => Direction::South,
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Direction::East => Direction::West,
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Direction::South => Direction::North,
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Direction::West => Direction::East,
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}
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}
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fn encode(&self) -> i64 {
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match self {
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Direction::North => 1,
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Direction::East => 4,
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Direction::South => 2,
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Direction::West => 3,
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}
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}
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}
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#[derive(Clone, Debug, PartialEq)]
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struct Path {
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steps: Vec<Direction>
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}
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impl Path {
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fn new() -> Path {
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Path{ steps: vec![] }
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}
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fn reverse(&self) -> Path {
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let mut steps = Vec::with_capacity(self.steps.len());
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for step in self.steps.iter().rev() {
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steps.push(step.reverse());
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}
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Path{ steps }
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}
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fn extend(&self) -> Vec<Path> {
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let mut res = Vec::with_capacity(4);
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for dir in ALL_DIRECTIONS.iter() {
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let mut copy = self.steps.clone();
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copy.push(*dir);
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res.push(Path{ steps: copy });
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}
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res
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}
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}
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struct RepairSearch {
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computer: Computer,
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}
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#[derive(Clone, Copy, Debug, PartialEq)]
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enum MoveResult {
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HitWall,
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Done,
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FoundSystem,
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}
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impl MoveResult {
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fn new(x: i64) -> MoveResult {
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match x {
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0 => MoveResult::HitWall,
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1 => MoveResult::Done,
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2 => MoveResult::FoundSystem,
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_ => panic!("Unknown move result!!"),
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}
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}
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}
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impl RepairSearch {
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fn new(f: &str) -> RepairSearch {
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let computer = Computer::load(f, 0);
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RepairSearch { computer }
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}
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fn try_path(&mut self, path: &Path) -> MoveResult {
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let ( mysend, mut corecv) = channel();
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let (mut cosend, mut myrecv) = channel();
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let my_computer = self.computer.clone();
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for step in path.steps.iter() {
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mysend.send(step.encode());
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}
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thread::spawn(move || my_computer.clone().run(&mut corecv, &mut cosend));
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let mut last_response = MoveResult::Done;
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for response in myrecv.take(path.steps.len()) {
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last_response = MoveResult::new(response);
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if last_response == MoveResult::HitWall {
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break
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}
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}
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last_response
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}
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fn run_search(&mut self) -> usize {
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let mut horizon = Path::new().extend();
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loop {
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let mut new_horizon = vec![];
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assert_ne!(horizon.len(), 0);
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println!("{} items at length {}", horizon.len(), horizon[0].steps.len());
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for path in horizon.iter() {
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let result = self.try_path(path);
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match result {
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MoveResult::HitWall => continue,
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MoveResult::Done => new_horizon.append(&mut path.extend()),
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MoveResult::FoundSystem => return path.steps.len(),
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}
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}
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horizon = new_horizon;
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}
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}
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}
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#[test]
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fn day15() {
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let mut day15a = RepairSearch::new("inputs/day15");
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assert_eq!(0, day15a.run_search());
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}
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