Completed day 11

This commit is contained in:
Tyler Hallada 2020-01-04 16:58:56 -05:00
parent c68eee28c7
commit 79645abe5a
5 changed files with 798 additions and 0 deletions

137
day11/Cargo.lock generated Normal file
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10
day11/Cargo.toml Normal file
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[package]
name = "day11"
version = "0.1.0"
authors = ["Tyler Hallada <tyler@hallada.net>"]
edition = "2018"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
num_enum = "0.4.2"

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day11/input/input.txt Normal file
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use std::collections::HashMap;
use std::convert::TryFrom;
use std::error::Error;
use std::fs::File;
use std::io::prelude::*;
use std::result;
use std::str::FromStr;
use num_enum::TryFromPrimitive;
type Result<T> = result::Result<T, Box<dyn Error>>;
#[derive(Debug, Clone, PartialEq)]
pub struct Intcode {
pub integers: HashMap<usize, i64>,
pub pointer: usize,
pub halted: bool,
pub relative_base: i64,
}
#[derive(Debug, PartialEq)]
pub struct Instruction {
opcode: Opcode,
parameter_modes: Vec<ParameterMode>,
}
impl TryFrom<i64> for Instruction {
type Error = Box<dyn Error>;
fn try_from(integer: i64) -> Result<Self> {
let opcode: Opcode = Opcode::try_from((integer % 100) as u8)?;
let modes_integer = integer / 100;
let mut parameter_modes = vec![];
for parameter_index in 0..opcode.parameter_count() {
parameter_modes.push(ParameterMode::try_from(
(modes_integer % (10_i64.pow(parameter_index + 1)) / 10_i64.pow(parameter_index))
as u8,
)?)
}
Ok(Instruction {
opcode,
parameter_modes,
})
}
}
#[derive(Debug, PartialEq, TryFromPrimitive)]
#[repr(u8)]
pub enum Opcode {
Add = 1,
Mult = 2,
Input = 3,
Output = 4,
JumpIfTrue = 5,
JumpIfFalse = 6,
LessThan = 7,
Equals = 8,
RelativeBaseOffset = 9,
Halt = 99,
}
impl Opcode {
pub fn parameter_count(&self) -> u32 {
match self {
Opcode::Add => 3,
Opcode::Mult => 3,
Opcode::Input => 1,
Opcode::Output => 1,
Opcode::JumpIfTrue => 2,
Opcode::JumpIfFalse => 2,
Opcode::LessThan => 3,
Opcode::Equals => 3,
Opcode::RelativeBaseOffset => 1,
Opcode::Halt => 0,
}
}
pub fn target_parameter_index(&self) -> Option<usize> {
match self {
Opcode::Add => Some(2),
Opcode::Mult => Some(2),
Opcode::Input => Some(0),
Opcode::Output => None,
Opcode::JumpIfTrue => None,
Opcode::JumpIfFalse => None,
Opcode::LessThan => Some(2),
Opcode::Equals => Some(2),
Opcode::RelativeBaseOffset => None,
Opcode::Halt => None,
}
}
}
#[derive(Debug, PartialEq, TryFromPrimitive)]
#[repr(u8)]
pub enum ParameterMode {
Position = 0,
Immediate = 1,
Relative = 2,
}
impl FromStr for Intcode {
type Err = Box<dyn Error>;
fn from_str(s: &str) -> Result<Intcode> {
let intcode_string = s.trim().to_string();
let mut integers = HashMap::new();
for (index, code) in intcode_string.split(',').enumerate() {
integers.insert(index, code.parse().unwrap());
}
Ok(Intcode::new(integers))
}
}
impl Intcode {
fn new(integers: HashMap<usize, i64>) -> Intcode {
Intcode {
integers,
pointer: 0,
halted: false,
relative_base: 0,
}
}
fn load_parameters(&mut self, pointer: usize, instruction: &Instruction) -> Vec<i64> {
(0..instruction.opcode.parameter_count() as usize)
.map(|parameter_index| {
let mut integer = *self
.integers
.entry(pointer + parameter_index + 1)
.or_insert(0);
match instruction.parameter_modes[parameter_index] {
ParameterMode::Position => match instruction.opcode.target_parameter_index() {
Some(target_parameter_index)
if target_parameter_index == parameter_index => {}
_ => {
integer = *self.integers.entry(integer as usize).or_insert(0);
}
},
ParameterMode::Relative => match instruction.opcode.target_parameter_index() {
Some(target_parameter_index)
if target_parameter_index == parameter_index =>
{
integer += self.relative_base;
}
_ => {
integer = *self
.integers
.entry((self.relative_base + integer) as usize)
.or_insert(0);
}
},
_ => {}
}
integer
})
.collect()
}
pub fn execute(&mut self, inputs: &[i64]) -> Result<Vec<i64>> {
let mut input_index = 0;
let mut output = vec![];
loop {
let instruction =
Instruction::try_from(*self.integers.entry(self.pointer).or_insert(0))?;
let parameters = self.load_parameters(self.pointer, &instruction);
let mut jump_pointer: Option<usize> = None;
match instruction.opcode {
Opcode::Add => {
self.integers
.insert(parameters[2] as usize, parameters[0] + parameters[1]);
}
Opcode::Mult => {
self.integers
.insert(parameters[2] as usize, parameters[0] * parameters[1]);
}
Opcode::Input => {
if input_index >= inputs.len() {
break; // pause execution to wait for more input
}
self.integers
.insert(parameters[0] as usize, inputs[input_index]);
input_index += 1;
}
Opcode::Output => {
output.push(parameters[0]);
}
Opcode::JumpIfTrue => {
if parameters[0] != 0 {
jump_pointer = Some(parameters[1] as usize);
}
}
Opcode::JumpIfFalse => {
if parameters[0] == 0 {
jump_pointer = Some(parameters[1] as usize);
}
}
Opcode::LessThan => {
if parameters[0] < parameters[1] {
self.integers.insert(parameters[2] as usize, 1);
} else {
self.integers.insert(parameters[2] as usize, 0);
}
}
Opcode::Equals => {
if parameters[0] == parameters[1] {
self.integers.insert(parameters[2] as usize, 1);
} else {
self.integers.insert(parameters[2] as usize, 0);
}
}
Opcode::RelativeBaseOffset => {
self.relative_base += parameters[0];
}
Opcode::Halt => {
self.halted = true;
break;
}
}
match jump_pointer {
Some(jump_pointer) => self.pointer = jump_pointer,
None => self.pointer += 1 + instruction.opcode.parameter_count() as usize,
}
}
Ok(output)
}
}
pub fn read_intcode(filename: &str) -> Result<Intcode> {
let mut file = File::open(filename)?;
let mut intcode_string = String::new();
file.read_to_string(&mut intcode_string)?;
Ok(intcode_string.parse()?)
}
#[cfg(test)]
mod tests {
use super::*;
const TEST_INPUT: &str = "input/test1.txt";
#[test]
fn reads_intcode() {
assert_eq!(
read_intcode(TEST_INPUT).unwrap(),
Intcode::new(
vec![3, 15, 3, 16, 1002, 16, 10, 16, 1, 16, 15, 15, 4, 15, 99, 0, 0]
.into_iter()
.enumerate()
.collect()
),
);
}
#[test]
fn converts_integer_to_instruction() {
assert_eq!(
Instruction::try_from(1002).unwrap(),
Instruction {
opcode: Opcode::Mult,
parameter_modes: vec![
ParameterMode::Position,
ParameterMode::Immediate,
ParameterMode::Position
],
}
);
assert_eq!(
Instruction::try_from(101).unwrap(),
Instruction {
opcode: Opcode::Add,
parameter_modes: vec![
ParameterMode::Immediate,
ParameterMode::Position,
ParameterMode::Position
],
}
);
}
#[test]
fn executes_intcodes() {
let mut intcode = Intcode::new(vec![1, 0, 0, 0, 99].into_iter().enumerate().collect());
intcode.execute(&[0]).unwrap();
assert_eq!(
intcode.integers,
vec![2, 0, 0, 0, 99].into_iter().enumerate().collect()
);
let mut intcode = Intcode::new(vec![2, 3, 0, 3, 99].into_iter().enumerate().collect());
intcode.execute(&[0]).unwrap();
assert_eq!(
intcode.integers,
vec![2, 3, 0, 6, 99].into_iter().enumerate().collect()
);
let mut intcode = Intcode::new(vec![2, 4, 4, 5, 99, 0].into_iter().enumerate().collect());
intcode.execute(&[0]).unwrap();
assert_eq!(
intcode.integers,
vec![2, 4, 4, 5, 99, 9801].into_iter().enumerate().collect()
);
let mut intcode = Intcode::new(
vec![1, 1, 1, 4, 99, 5, 6, 0, 99]
.into_iter()
.enumerate()
.collect(),
);
intcode.execute(&[0]).unwrap();
assert_eq!(
intcode.integers,
vec![30, 1, 1, 4, 2, 5, 6, 0, 99]
.into_iter()
.enumerate()
.collect()
);
let mut intcode = Intcode::new(
vec![1, 9, 10, 3, 2, 3, 11, 0, 99, 30, 40, 50]
.into_iter()
.enumerate()
.collect(),
);
intcode.execute(&[0]).unwrap();
assert_eq!(
intcode.integers,
vec![3500, 9, 10, 70, 2, 3, 11, 0, 99, 30, 40, 50]
.into_iter()
.enumerate()
.collect()
);
}
#[test]
fn less_and_equal_outputs() {
let intcode = Intcode::new(
vec![3, 9, 8, 9, 10, 9, 4, 9, 99, -1, 8]
.into_iter()
.enumerate()
.collect(),
);
assert_eq!(intcode.clone().execute(&[8]).unwrap(), vec![1]);
assert_eq!(intcode.clone().execute(&[0]).unwrap(), vec![0]);
let intcode = Intcode::new(
vec![3, 9, 7, 9, 10, 9, 4, 9, 99, -1, 8]
.into_iter()
.enumerate()
.collect(),
);
assert_eq!(intcode.clone().execute(&[0]).unwrap(), vec![1]);
assert_eq!(intcode.clone().execute(&[9]).unwrap(), vec![0]);
let intcode = Intcode::new(
vec![3, 3, 1108, -1, 8, 3, 4, 3, 99]
.into_iter()
.enumerate()
.collect(),
);
assert_eq!(intcode.clone().execute(&[8]).unwrap(), vec![1]);
assert_eq!(intcode.clone().execute(&[0]).unwrap(), vec![0]);
let intcode = Intcode::new(
vec![3, 3, 1107, -1, 8, 3, 4, 3, 99]
.into_iter()
.enumerate()
.collect(),
);
assert_eq!(intcode.clone().execute(&[0]).unwrap(), vec![1]);
assert_eq!(intcode.clone().execute(&[9]).unwrap(), vec![0]);
}
#[test]
fn jump_outputs() {
let intcode = Intcode::new(
vec![3, 12, 6, 12, 15, 1, 13, 14, 13, 4, 13, 99, -1, 0, 1, 9]
.into_iter()
.enumerate()
.collect(),
);
assert_eq!(intcode.clone().execute(&[0]).unwrap(), vec![0]);
assert_eq!(intcode.clone().execute(&[1]).unwrap(), vec![1]);
let intcode = Intcode::new(
vec![3, 3, 1105, -1, 9, 1101, 0, 0, 12, 4, 12, 99, 1]
.into_iter()
.enumerate()
.collect(),
);
assert_eq!(intcode.clone().execute(&[0]).unwrap(), vec![0]);
assert_eq!(intcode.clone().execute(&[1]).unwrap(), vec![1]);
}
#[test]
fn larger_part2_intcode() {
let intcode = Intcode::new(
vec![
3, 21, 1008, 21, 8, 20, 1005, 20, 22, 107, 8, 21, 20, 1006, 20, 31, 1106, 0, 36,
98, 0, 0, 1002, 21, 125, 20, 4, 20, 1105, 1, 46, 104, 999, 1105, 1, 46, 1101, 1000,
1, 20, 4, 20, 1105, 1, 46, 98, 99,
]
.into_iter()
.enumerate()
.collect(),
);
assert_eq!(intcode.clone().execute(&[0]).unwrap(), vec![999]);
assert_eq!(intcode.clone().execute(&[8]).unwrap(), vec![1000]);
assert_eq!(intcode.clone().execute(&[9]).unwrap(), vec![1001]);
}
#[test]
fn multiple_input_intcode() {
let intcode = Intcode::new(
vec![
3, 15, 3, 16, 1002, 16, 10, 16, 1, 16, 15, 15, 4, 15, 99, 0, 0,
]
.into_iter()
.enumerate()
.collect(),
);
assert_eq!(intcode.clone().execute(&[1, 1]).unwrap(), vec![11]);
}
#[test]
fn relative_base_offset_quine() {
let code = vec![
109, 1, 204, -1, 1001, 100, 1, 100, 1008, 100, 16, 101, 1006, 101, 0, 99,
];
let intcode = Intcode::new(code.clone().into_iter().enumerate().collect());
assert_eq!(intcode.clone().execute(&[]).unwrap(), code);
}
#[test]
fn sixteen_digit_output() {
let code = vec![1102, 34915192, 34915192, 7, 4, 7, 99, 0];
let intcode = Intcode::new(code.into_iter().enumerate().collect());
assert_eq!(intcode.clone().execute(&[]).unwrap(), [1219070632396864]);
}
#[test]
fn large_output() {
let code = vec![104, 1125899906842624, 99];
let intcode = Intcode::new(code.into_iter().enumerate().collect());
assert_eq!(intcode.clone().execute(&[]).unwrap(), [1125899906842624]);
}
#[test]
fn relative_target_parameters() {
let code = vec![109, 1, 203, 2, 204, 2, 99];
let intcode = Intcode::new(code.into_iter().enumerate().collect());
assert_eq!(intcode.clone().execute(&[123]).unwrap(), [123]);
}
}

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day11/src/main.rs Normal file
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use std::collections::HashMap;
use std::convert::TryFrom;
use std::error::Error;
use std::fmt;
use std::result;
use num_enum::TryFromPrimitive;
mod intcode;
use intcode::{read_intcode, Intcode};
const INPUT: &str = "input/input.txt";
type Result<T> = result::Result<T, Box<dyn Error>>;
#[derive(TryFromPrimitive, Clone, Copy)]
#[repr(u8)]
enum Color {
Black = 0,
White = 1,
}
#[derive(TryFromPrimitive, Clone, Copy)]
#[repr(u8)]
enum Turn {
Left = 0,
Right = 1,
}
#[derive(TryFromPrimitive, Clone, Copy)]
#[repr(u8)]
enum Direction {
Left = 0,
Right = 1,
Up = 2,
Down = 3,
}
impl Direction {
fn turn(&self, turn: Turn) -> Direction {
match turn {
Turn::Left => match self {
Direction::Left => Direction::Down,
Direction::Right => Direction::Up,
Direction::Up => Direction::Left,
Direction::Down => Direction::Right,
},
Turn::Right => match self {
Direction::Left => Direction::Up,
Direction::Right => Direction::Down,
Direction::Up => Direction::Right,
Direction::Down => Direction::Left,
},
}
}
}
#[derive(PartialEq, Eq, Hash, Clone, Copy)]
struct Coordinate {
x: i64,
y: i64,
}
struct Robot {
intcode: Intcode,
position: Coordinate,
direction: Direction,
}
impl Robot {
fn new(intcode: Intcode) -> Robot {
Robot {
intcode: intcode.clone(),
position: Coordinate { x: 0, y: 0 },
direction: Direction::Up,
}
}
fn turn_and_move(&mut self, turn: Turn) {
self.direction = self.direction.turn(turn);
match self.direction {
Direction::Left => self.position.x -= 1,
Direction::Right => self.position.x += 1,
Direction::Up => self.position.y -= 1,
Direction::Down => self.position.y += 1,
}
}
}
struct Hull {
panels: HashMap<Coordinate, Color>,
}
impl Hull {
fn new() -> Hull {
Hull {
panels: HashMap::new(),
}
}
fn paint_registration(&mut self, intcode: Intcode, start_color: Color) -> Result<()> {
let mut robot = Robot::new(intcode);
let mut current_panel = start_color;
while !robot.intcode.halted {
let output = robot
.intcode
.execute(&[current_panel as i64])
.expect("Failed to execute intcode");
let color = Color::try_from(output[0] as u8)?;
let turn = Turn::try_from(output[1] as u8)?;
self.panels.insert(robot.position, color);
robot.turn_and_move(turn);
current_panel = *self.panels.get(&robot.position).unwrap_or(&Color::Black);
}
Ok(())
}
}
impl fmt::Display for Hull {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
let start_coord = Coordinate { x: 0, y: 0 };
let up_left_corner = Coordinate {
x: self
.panels
.keys()
.min_by_key(|coord| coord.x)
.unwrap_or(&start_coord)
.x,
y: self
.panels
.keys()
.min_by_key(|coord| coord.y)
.unwrap_or(&start_coord)
.y,
};
let down_right_corner = Coordinate {
x: self
.panels
.keys()
.max_by_key(|coord| coord.x)
.unwrap_or(&start_coord)
.x,
y: self
.panels
.keys()
.max_by_key(|coord| coord.y)
.unwrap_or(&start_coord)
.y,
};
for y in up_left_corner.y..=down_right_corner.y {
let mut row_string = String::new();
for x in up_left_corner.x..=down_right_corner.x {
row_string += match self
.panels
.get(&Coordinate { x, y })
.unwrap_or(&Color::Black)
{
Color::Black => ".",
Color::White => "#",
};
}
write!(f, "{}\n", row_string)?;
}
Ok(())
}
}
fn solve_part1() -> Result<usize> {
let intcode = read_intcode(INPUT)?;
let mut hull = Hull::new();
hull.paint_registration(intcode, Color::Black)?;
Ok(hull.panels.len())
}
fn solve_part2() -> Result<String> {
let intcode = read_intcode(INPUT)?;
let mut hull = Hull::new();
hull.paint_registration(intcode, Color::White)?;
Ok(format!("\n{}", hull))
}
fn main() -> Result<()> {
println!("Part 1: {}", solve_part1()?);
println!("Part 2: {}", solve_part2()?);
Ok(())
}