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use aoc2019::*;
use std::io;
use std::io::prelude::*;
use std::process;
use structopt::StructOpt;
#[derive(Debug, StructOpt)]
#[structopt(name = "Day 21: Springdroid Adventure")]
/// Pilots a springdroid around!
///
/// See https://adventofcode.com/2019/day/21 for details.
struct Opt {}
fn main() {
let stdin = io::stdin();
let _opt = Opt::from_args();
let program: IntcodeProgram = stdin
.lock()
.split(b',')
.map(|x| exit_on_failed_assertion(x, "Error reading input"))
.map(|x| exit_on_failed_assertion(String::from_utf8(x), "Input was not valid UTF-8"))
.map(|x| exit_on_failed_assertion(x.trim().parse::<Intcode>(), "Invalid number"))
.collect::<IntcodeProgram>();
let walk_result = exit_on_failed_assertion(
{
let input = vec![
"NOT T T\n",
"AND A T\n",
"AND B T\n",
"AND C T\n",
"NOT T J\n",
"AND D J\n",
"WALK\n",
];
program
.with_input(
input
.iter()
.flat_map(|line| line.chars().map(|c| Intcode::from(c as u8)))
.collect(),
)
.execute()
},
"Program failed",
);
println!(
"{}",
walk_result
.drop_last()
.unwrap()
.iter()
.flat_map(|c| c.to_signed_bytes_be())
.map(|c| c as char)
.collect::<String>()
);
println!("{}", walk_result.last().unwrap());
let run_result = exit_on_failed_assertion(
{
// (!A || !B || !C) && D && (E || H)
let input = vec![
"OR E J\n",
"OR H J\n",
"AND D J\n",
"NOT T T\n",
"AND A T\n",
"AND B T\n",
"AND C T\n",
"NOT T T\n",
"AND T J\n",
"RUN\n",
];
program
.with_input(
input
.iter()
.flat_map(|line| line.chars().map(|c| Intcode::from(c as u8)))
.collect(),
)
.execute()
},
"Program failed",
);
println!(
"{}",
run_result
.drop_last()
.unwrap()
.iter()
.flat_map(|c| c.to_signed_bytes_be())
.map(|c| c as char)
.collect::<String>()
);
println!("{}", run_result.last().unwrap());
}
fn exit_on_failed_assertion<A, E: std::error::Error>(data: Result<A, E>, message: &str) -> A {
match data {
Ok(data) => data,
Err(e) => {
eprintln!("{}: {}", message, e);
process::exit(1);
}
}
}
|
