done with day8, part1

2022-aoc/Cargo.toml

@@ -11,3 +11,4 @@ aoc-runner-derive = "0.3"
 lazy_static = "1.4.0"
 #itertools = "0.10.5"
 regex = "1.7"
+ndarray = "0.15"

2022-aoc/src/d8.rs

@@ -0,0 +1,81 @@
+use std::collections::HashSet;
+
+use aoc_runner_derive::{aoc as aoc_run, aoc_generator};
+
+use ndarray::prelude::*;
+
+type Forest = Array2<i8>;
+type Tree = (i8, i8);
+
+#[aoc_generator(day8)]
+fn parse_input_day1(input: &str) -> Forest {
+    let nrows = input.lines().map(|_| ()).collect::<Vec<_>>().len();
+    let ncols = input.lines().next().unwrap().len();
+    let shape = (nrows, ncols);
+    let mut arr = Array2::zeros(shape);
+    for (row, line) in input.lines().enumerate() {
+        for (col, tree) in line.chars().enumerate() {
+            arr[[row, col]] = tree.to_digit(10).unwrap() as i8;
+        }
+    }
+    arr
+}
+
+#[aoc_run(day8, part1)]
+fn part1(input: &Forest) -> usize {
+    let mut viz = HashSet::new();
+    for (ridx, row) in input.rows().into_iter().enumerate() {
+        let mut max = -1;
+        for (cidx, &tree) in row.as_slice().unwrap().iter().enumerate() {
+            if tree > max {
+                let addr = (ridx, cidx);
+                viz.insert(addr);
+                max = tree;
+            }
+        }
+        max = -1;
+        for (cidx, &tree) in row.as_slice().unwrap().iter().enumerate().rev() {
+            if tree > max {
+                viz.insert((ridx, cidx));
+                max = tree;
+            }
+        }
+    }
+
+    for (cidx, col) in input.columns().into_iter().enumerate() {
+        let mut max = -1;
+        for (ridx, &tree) in col
+            .as_standard_layout()
+            .as_slice()
+            .unwrap()
+            .iter()
+            .enumerate()
+        {
+            if tree > max {
+                viz.insert((ridx, cidx));
+                max = tree;
+            }
+        }
+        max = -1;
+        for (ridx, &tree) in col
+            .as_standard_layout()
+            .as_slice()
+            .unwrap()
+            .iter()
+            .enumerate()
+            .rev()
+        {
+            if tree > max {
+                viz.insert((ridx, cidx));
+                max = tree;
+            }
+        }
+    }
+
+    viz.len()
+}
+
+#[aoc_run(day8, part2)]
+fn part2(input: &Forest) -> usize {
+    0
+}

2022-aoc/src/lib.rs

@@ -7,5 +7,6 @@ mod d4;
 mod d5;
 mod d6;
 mod d7;
+mod d8;
 
 aoc_lib! { year = 2022 }