From a014b25947af141b465f57dd8d1c5b14148cb382 Mon Sep 17 00:00:00 2001
From: Savanni D'Gerinel <savanni@luminescent-dreams.com>
Date: Sat, 26 Nov 2022 21:39:02 -0500
Subject: [PATCH] Demonstrate solving the first problems from 2021

---
 .gitignore              |  1 +
 problems/Cargo.lock     |  7 +++++++
 problems/Cargo.toml     |  8 ++++++++
 problems/data/day1a.txt | 10 ++++++++++
 problems/src/day1.rs    | 25 +++++++++++++++++++++++++
 problems/src/main.rs    | 14 ++++++++++++++
 6 files changed, 65 insertions(+)
 create mode 100644 problems/Cargo.lock
 create mode 100644 problems/Cargo.toml
 create mode 100644 problems/data/day1a.txt
 create mode 100644 problems/src/day1.rs
 create mode 100644 problems/src/main.rs

diff --git a/.gitignore b/.gitignore
index 92b2793..bd32e74 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 .direnv
+target
diff --git a/problems/Cargo.lock b/problems/Cargo.lock
new file mode 100644
index 0000000..5cceaa4
--- /dev/null
+++ b/problems/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "problems"
+version = "0.1.0"
diff --git a/problems/Cargo.toml b/problems/Cargo.toml
new file mode 100644
index 0000000..7bf1070
--- /dev/null
+++ b/problems/Cargo.toml
@@ -0,0 +1,8 @@
+[package]
+name = "problems"
+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/problems/data/day1a.txt b/problems/data/day1a.txt
new file mode 100644
index 0000000..167e291
--- /dev/null
+++ b/problems/data/day1a.txt
@@ -0,0 +1,10 @@
+199
+200
+208
+210
+200
+207
+240
+269
+260
+263
diff --git a/problems/src/day1.rs b/problems/src/day1.rs
new file mode 100644
index 0000000..5afd767
--- /dev/null
+++ b/problems/src/day1.rs
@@ -0,0 +1,25 @@
+const PART1: &str = include_str!("../data/day1a.txt");
+
+pub fn part1() -> String {
+    let lines = PART1.lines();
+
+    let depths: Vec<i32> = lines.map(|l| l.parse::<i32>().unwrap()).collect();
+
+    let depths_a = depths.iter();
+    let depths_b = depths.iter().skip(1);
+    let depth_cmp = depths_a.zip(depths_b);
+
+    let increases = depth_cmp.fold(0, |cur, (a, b)| {
+        println!("{} < {}? {}", a, b, a < b);
+        if a < b {
+            cur + 1
+        } else {
+            cur
+        }
+    });
+    format!("{}", increases)
+}
+
+pub fn part2() -> String {
+    "no response".to_owned()
+}
diff --git a/problems/src/main.rs b/problems/src/main.rs
new file mode 100644
index 0000000..1ca43ac
--- /dev/null
+++ b/problems/src/main.rs
@@ -0,0 +1,14 @@
+mod day1;
+
+fn main() {
+    let day = std::env::args().skip(1).next();
+    println!("day: {:?}", day);
+
+    let result = match day.as_ref().map(|v| v.as_ref()) {
+        Some("day1a") => day1::part1(),
+        Some("day1b") => day1::part2(),
+        _ => panic!("unrecognized day"),
+    };
+
+    println!("{:?} Result: {}", day, result);
+}