From 7e7054e359a9dc5e67068521c3f6c7685939260c Mon Sep 17 00:00:00 2001
From: Timothy Warren <twarren@nabancard.com>
Date: Thu, 8 Dec 2022 08:38:47 -0500
Subject: [PATCH] Start day 8

---
 day8/Cargo.lock    |  7 ++++
 day8/Cargo.toml    |  8 ++++
 day8/README.md     | 33 ++++++++++++++++
 day8/src/input.txt | 99 ++++++++++++++++++++++++++++++++++++++++++++++
 day8/src/main.rs   |  8 ++++
 5 files changed, 155 insertions(+)
 create mode 100644 day8/Cargo.lock
 create mode 100644 day8/Cargo.toml
 create mode 100644 day8/README.md
 create mode 100644 day8/src/input.txt
 create mode 100644 day8/src/main.rs

diff --git a/day8/Cargo.lock b/day8/Cargo.lock
new file mode 100644
index 0000000..0a523ad
--- /dev/null
+++ b/day8/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "day8"
+version = "0.1.0"
diff --git a/day8/Cargo.toml b/day8/Cargo.toml
new file mode 100644
index 0000000..4879259
--- /dev/null
+++ b/day8/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "day8"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
diff --git a/day8/README.md b/day8/README.md
new file mode 100644
index 0000000..fc1bcdb
--- /dev/null
+++ b/day8/README.md
@@ -0,0 +1,33 @@
+# Day 8: Treetop Tree House
+
+## Part 1
+
+The expedition comes across a peculiar patch of tall trees all planted carefully in a grid. The Elves explain that a previous expedition planted these trees as a reforestation effort. Now, they're curious if this would be a good location for a tree house.
+
+First, determine whether there is enough tree cover here to keep a tree house hidden. To do this, you need to count the number of trees that are visible from outside the grid when looking directly along a row or column.
+
+The Elves have already launched a quadcopter to generate a map with the height of each tree (your puzzle input). For example:
+
+    30373
+    25512
+    65332
+    33549
+    35390
+
+Each tree is represented as a single digit whose value is its height, where 0 is the shortest and 9 is the tallest.
+
+A tree is visible if all of the other trees between it and an edge of the grid are shorter than it. Only consider trees in the same row or column; that is, only look up, down, left, or right from any given tree.
+
+All of the trees around the edge of the grid are visible - since they are already on the edge, there are no trees to block the view. In this example, that only leaves the interior nine trees to consider:
+
+* The top-left 5 is visible from the left and top. (It isn't visible from the right or bottom since other trees of height 5 are in the way.)
+* The top-middle 5 is visible from the top and right.
+* The top-right 1 is not visible from any direction; for it to be visible, there would need to only be trees of height 0 between it and an edge.
+* The left-middle 5 is visible, but only from the right.
+* The center 3 is not visible from any direction; for it to be visible, there would need to be only trees of at most height 2 between it and an edge.
+* The right-middle 3 is visible from the right.
+* In the bottom row, the middle 5 is visible, but the 3 and 4 are not.
+
+With 16 trees visible on the edge and another 5 visible in the interior, a total of 21 trees are visible in this arrangement.
+
+Consider your map; how many trees are visible from outside the grid?
diff --git a/day8/src/input.txt b/day8/src/input.txt
new file mode 100644
index 0000000..a703253
--- /dev/null
+++ b/day8/src/input.txt
@@ -0,0 +1,99 @@
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diff --git a/day8/src/main.rs b/day8/src/main.rs
new file mode 100644
index 0000000..5b34eae
--- /dev/null
+++ b/day8/src/main.rs
@@ -0,0 +1,8 @@
+fn main() {
+    let file_str = include_str!("input.txt");
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+}
\ No newline at end of file