day 17 task 1

src/main.rs

@@ -1,5 +1,5 @@
 mod tasks;
 
 fn main() {
-    tasks::day18::run();
+    tasks::day17::run();
 }

src/tasks/day17.rs

@@ -0,0 +1,57 @@
+use super::day05::*;
+
+pub fn run() {
+    let input: RAM = std::fs::read_to_string("input/day17.txt")
+        .unwrap()
+        .split(",")
+        .enumerate()
+        .map(|(i, it)| (i, it.parse::<i128>().unwrap()))
+        .collect();
+
+    task1(input.clone());
+}
+
+fn task1(ram: RAM) {
+    let mut pc = IntCodeComputer::new(vec![], ram);
+    pc.run_until_end();
+    let map: Vec<Vec<char>> = pc
+        .get_output()
+        .iter()
+        .map(|it| (*it as u8) as char)
+        .collect::<String>()
+        .lines()
+        .map(|line| line.chars().collect())
+        .collect();
+    let height = map.len();
+    let width = map[0].len();
+    let alignment_sum = (1..height - 1).fold(0, |sum, y| {
+        sum + (1..width - 1).fold(0, |sum, x| {
+            let pos = Pos(x, y);
+            if map[y][x] == '#'
+                && pos
+                    .neighbors()
+                    .iter()
+                    .all(|Pos(xp, yp)| map[*yp][*xp] == '#')
+            {
+                sum + pos.0 * pos.1
+            } else {
+                sum
+            }
+        })
+    });
+
+    println!("Task 1: sum of alignment parameters is {}", alignment_sum);
+}
+
+struct Pos(usize, usize);
+
+impl Pos {
+    fn neighbors(&self) -> Vec<Pos> {
+        vec![
+            Pos(self.0 - 1, self.1),
+            Pos(self.0 + 1, self.1),
+            Pos(self.0, self.1 - 1),
+            Pos(self.0, self.1 - 1),
+        ]
+    }
+}

src/tasks/mod.rs

@@ -13,5 +13,6 @@ pub mod day13;
 pub mod day14;
 pub mod day15;
 pub mod day16;
+pub mod day17;
 pub mod day18;
 pub mod day21;