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-rw-r--r--2019/src/bin/day_21.rs109
1 files changed, 109 insertions, 0 deletions
diff --git a/2019/src/bin/day_21.rs b/2019/src/bin/day_21.rs
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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);
+ }
+ }
+}