From df1ea7405a6e2ce2b4b39f06e23b318e157a0699 Mon Sep 17 00:00:00 2001
From: Codinget <codinget@codi.moe>
Date: Tue, 3 Dec 2024 08:04:53 +0000
Subject: [PATCH] day 1, rust

---
 .gitignore     |  2 ++
 01/Cargo.lock  |  7 +++++++
 01/Cargo.toml  |  6 ++++++
 01/src/main.rs | 30 ++++++++++++++++++++++++++++++
 4 files changed, 45 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 01/Cargo.lock
 create mode 100644 01/Cargo.toml
 create mode 100644 01/src/main.rs

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..a172e65
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+target/
+input.txt
diff --git a/01/Cargo.lock b/01/Cargo.lock
new file mode 100644
index 0000000..861e054
--- /dev/null
+++ b/01/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "aoc2024-01"
+version = "0.1.0"
diff --git a/01/Cargo.toml b/01/Cargo.toml
new file mode 100644
index 0000000..c179218
--- /dev/null
+++ b/01/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "aoc2024-01"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/01/src/main.rs b/01/src/main.rs
new file mode 100644
index 0000000..c88e0f9
--- /dev/null
+++ b/01/src/main.rs
@@ -0,0 +1,30 @@
+fn main() {
+    let raw = std::fs::read_to_string("input.txt").expect("Couldn't read input");
+    let mut left = Vec::new();
+    let mut right = Vec::new();
+    for line in raw.split("\n") {
+        if line.is_empty() {
+            continue;
+        }
+        let split = line
+            .split("   ")
+            .map(|x| x.parse())
+            .collect::<Result<Vec<u32>, _>>()
+            .unwrap();
+        left.push(split[0]);
+        right.push(split[1]);
+    }
+    left.sort();
+    right.sort();
+    let first = left
+        .iter()
+        .zip(right.iter())
+        .map(|(a, b)| a.max(b) - a.min(b))
+        .fold(0, |a, b| a + b);
+    println!("{}", first);
+    let second = left
+        .iter()
+        .map(|a| *a * right.iter().filter(|b| *a == **b).count() as u32)
+        .fold(0, |a, b| a + b);
+    println!("{}", second);
+}