From 20b3e5e07b336e03798f3da04e132206a042e82f Mon Sep 17 00:00:00 2001
From: Gabe Venberg <venberggabe@johndeere.com>
Date: Sat, 18 Nov 2023 20:16:06 -0600
Subject: [PATCH] day 08 part 1.

---
 Cargo.toml             |  4 ++
 src/day08/input.txt    | 99 ++++++++++++++++++++++++++++++++++++++++++
 src/day08/part1.rs     | 88 +++++++++++++++++++++++++++++++++++++
 src/day08/solve.rs     | 15 +++++++
 src/day08/utilities.rs | 27 ++++++++++++
 5 files changed, 233 insertions(+)
 create mode 100644 src/day08/input.txt
 create mode 100644 src/day08/part1.rs
 create mode 100644 src/day08/solve.rs
 create mode 100644 src/day08/utilities.rs

diff --git a/Cargo.toml b/Cargo.toml
index 92627cf..4311748 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -38,6 +38,10 @@ path="src/day06/solve.rs"
 name="day07"
 path="src/day07/solve.rs"
 
+[[bin]]
+name="day08"
+path="src/day08/solve.rs"
+
 [dependencies]
 regex="1"
 once_cell = "1.16"
diff --git a/src/day08/input.txt b/src/day08/input.txt
new file mode 100644
index 0000000..a531013
--- /dev/null
+++ b/src/day08/input.txt
@@ -0,0 +1,99 @@
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diff --git a/src/day08/part1.rs b/src/day08/part1.rs
new file mode 100644
index 0000000..77b2a34
--- /dev/null
+++ b/src/day08/part1.rs
@@ -0,0 +1,88 @@
+#![allow(unused)]
+use crate::utilities::*;
+
+type StructuredInput = Vec<Vec<u8>>;
+
+pub fn part1(input: &StructuredInput) -> usize {
+    let mut acc: usize = 0;
+    for y in 0..input.len(){
+        for x in 0..input[0].len(){
+            if is_visible(x, y, input){
+                acc+=1;
+            }
+        }
+    }
+    acc
+}
+
+fn is_visible(x: usize, y: usize, input: &StructuredInput) -> bool {
+    is_visible_north(x, y, input)
+        || is_visible_east(x, y, input)
+        || is_visible_south(x, y, input)
+        || is_visible_west(x, y, input)
+}
+fn is_visible_north(x: usize, y: usize, input: &StructuredInput) -> bool {
+    if y == 0 {
+        return true;
+    };
+    let hight = input[y][x];
+    for y in 0..y {
+        if input[y][x] >= hight {
+            return false;
+        }
+    }
+    true
+}
+fn is_visible_east(x: usize, y: usize, input: &StructuredInput) -> bool {
+    if x == input[0].len() {
+        return true;
+    }
+    let hight = input[y][x];
+    for x in (x + 1)..input[0].len() {
+        if input[y][x] >= hight {
+            return false;
+        }
+    }
+    true
+}
+fn is_visible_south(x: usize, y: usize, input: &StructuredInput) -> bool {
+    if y == input.len() {
+        return true;
+    };
+    let hight = input[y][x];
+    for y in (y + 1)..input.len() {
+        if input[y][x] >= hight {
+            return false;
+        }
+    }
+    true
+}
+fn is_visible_west(x: usize, y: usize, input: &StructuredInput) -> bool {
+    if x == input[0].len() {
+        return true;
+    }
+    let hight = input[y][x];
+    for x in 0..x {
+        if input[y][x] >= hight {
+            return false;
+        }
+    }
+    true
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_part1() {
+        let input = vec![
+            vec![3, 0, 3, 7, 3],
+            vec![2, 5, 5, 1, 2],
+            vec![6, 5, 3, 3, 2],
+            vec![3, 3, 5, 4, 9],
+            vec![3, 5, 3, 9, 0],
+        ];
+        assert_eq!(part1(&input), 21);
+    }
+}
diff --git a/src/day08/solve.rs b/src/day08/solve.rs
new file mode 100644
index 0000000..f1896c1
--- /dev/null
+++ b/src/day08/solve.rs
@@ -0,0 +1,15 @@
+#![allow(dead_code)]
+mod part1;
+mod part2;
+mod utilities;
+
+fn main() {
+    let input = include_str!("./input.txt");
+    let structured_input = utilities::parse(input);
+
+    println!("Part One");
+    println!("Result: {}", part1::part1(&structured_input));
+
+    println!("Part Two");
+    println!("Result: {}", part2::part2());
+}
diff --git a/src/day08/utilities.rs b/src/day08/utilities.rs
new file mode 100644
index 0000000..cb2416b
--- /dev/null
+++ b/src/day08/utilities.rs
@@ -0,0 +1,27 @@
+#![allow(unused)]
+pub fn parse(input: &str) -> Vec<Vec<u8>> {
+    input
+        .lines()
+        .map(|l| l.chars().map(|c| c.to_digit(10).unwrap() as u8).collect())
+        .collect()
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn test_parse() {
+        let input = concat!("30373\n", "25512\n", "65332\n", "33549\n", "35390\n",);
+        assert_eq!(
+            parse(input),
+            vec![
+                vec![3, 0, 3, 7, 3],
+                vec![2, 5, 5, 1, 2],
+                vec![6, 5, 3, 3, 2],
+                vec![3, 3, 5, 4, 9],
+                vec![3, 5, 3, 9, 0]
+            ]
+        );
+    }
+}