day02: simplify slightly.

day02/src/main.rs

@@ -6,22 +6,20 @@ use std::process::exit;
 
 use intcode::{Computer, Word};
 
-type Num = Word;
-
-fn compute(mem: Vec<Num>, noun: Num, verb: Num) -> Num {
+fn compute(mem: Vec<Word>, noun: Word, verb: Word) -> Word {
     let mut cpu = Computer::new(mem.into_iter().collect());
     cpu.write(1, noun).unwrap();
     cpu.write(2, verb).unwrap();
     cpu.run(&mut ()).unwrap();
     return cpu.read(0).unwrap();
 }
 
-fn part1(mem: Vec<Num>) {
+fn part1(mem: Vec<Word>) {
     println!("{}", compute(mem, 12, 2));
 }
 
-fn part2(mem: Vec<Num>) {
-    const MOON: Num = 19690720;
+fn part2(mem: Vec<Word>) {
+    const MOON: Word = 19690720;
 
     for noun in 0..=99 {
         for verb in 0..=99 {
@@ -36,12 +34,12 @@ fn part2(mem: Vec<Num>) {
 
 fn main() {
     let stdin = stdin();
-    let mem: Vec<Num> =
+    let mem: Vec<Word> =
         stdin.lock()
              .split(b',')
              .map(|r| r.expect("I/O error reading stdin"))
              .map(|b| String::from_utf8(b).expect("encoding error on stdin"))
-             .map(|s| Num::from_str(s.trim())
+             .map(|s| Word::from_str(s.trim())
                   .unwrap_or_else(|e| panic!("bad number {:?}: {}", s, e)))
              .collect();
     match args().nth(1).as_ref().map(|s| s as &str) { // sigh