Day 13 part 1

2019/src/bin/day13.rs

@@ -0,0 +1,40 @@
+use std::{fs, io};
+
+use advent_of_code::computer::{ComputeResult, Computer};
+use advent_of_code::input;
+use advent_of_code::point::Point;
+use std::collections::HashMap;
+use std::convert::TryFrom;
+
+fn main() -> io::Result<()> {
+    let input = fs::read_to_string("input/day13.txt")?;
+    let program = input::read_separated_line(',', &input)?;
+
+    let mut computer = Computer::new('G', program, vec![], vec![]);
+    let res = computer.run(None, None);
+    assert_eq!(res, ComputeResult::Halted);
+
+    // Process the output
+    let final_state: HashMap<_, _> = computer
+        .output()
+        .chunks(3)
+        .map(|chunks| {
+            (
+                Point(
+                    i32::try_from(chunks[0]).unwrap(),
+                    i32::try_from(chunks[1]).unwrap(),
+                ),
+                i32::try_from(chunks[2]).unwrap(),
+            )
+        })
+        .collect();
+
+    // How many block tiles are on the screen when the game exits?
+    let block_count = final_state
+        .iter()
+        .filter(|(_point, &tile_id)| tile_id == 2)
+        .count();
+    println!("Part 1: {}", block_count);
+
+    Ok(())
+}

2019/src/computer.rs

@@ -33,6 +33,7 @@ pub struct Pipe {
     last: Option<i64>,
 }
 
+#[derive(Debug, Eq, PartialEq)]
 pub enum ComputeResult {
     Halted,
     NeedsInput,