From 49c441a277a52ab4faa12e00f01f64bb4025ed58 Mon Sep 17 00:00:00 2001
From: LeMoonStar <webmaster@unitcore.de>
Date: Sun, 1 Dec 2024 06:37:02 +0100
Subject: [PATCH] =?UTF-8?q?=E2=9C=A8=20Day=201?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .gitignore                      |  2 +-
 README.md                       |  4 ++--
 src/days/d01.rs                 | 34 ++++++++++++++++++++++++++++-----
 src/days/test_inputs/test01.txt |  6 ++++++
 4 files changed, 38 insertions(+), 8 deletions(-)

diff --git a/.gitignore b/.gitignore
index a8a44e6..ea6a73a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,2 @@
 /target
-.aoc23_cache
\ No newline at end of file
+.aoc24_cache
\ No newline at end of file
diff --git a/README.md b/README.md
index d321dcf..e2511d5 100644
--- a/README.md
+++ b/README.md
@@ -3,8 +3,8 @@
 [![About](https://img.shields.io/badge/Advent%20of%20Code-2024-brightgreen?style=flat-square)](https://adventofcode.com/2024/about)
 [![Language: Rust](https://img.shields.io/badge/Language-Rust-orange.svg?style=flat-square)](https://en.wikipedia.org/wiki/Rust_(programming_language))
 [![License: MIT](https://img.shields.io/badge/License-MIT-blue.svg?style=flat-square)](https://mit-license.org/)
-![Days completed](https://img.shields.io/badge/Days%20completed-0-red?style=flat-square)
-![Stars](https://img.shields.io/badge/Stars-0-yellow?style=flat-square)
+![Days completed](https://img.shields.io/badge/Days%20completed-1-red?style=flat-square)
+![Stars](https://img.shields.io/badge/Stars-2-yellow?style=flat-square)
 
 > ⚠️ This README is copied from my previous years solution. It is not fully adopted to 2024 yet.
 
diff --git a/src/days/d01.rs b/src/days/d01.rs
index f857a01..0923bd9 100644
--- a/src/days/d01.rs
+++ b/src/days/d01.rs
@@ -2,7 +2,7 @@ use super::{Answer, Day, DayImpl};
 
 const CURRENT_DAY: u8 = 1;
 
-type Data = Vec<u64>;
+type Data = Vec<[u64; 2]>;
 impl DayImpl<Data> for Day<CURRENT_DAY> {
     fn init_test() -> (Self, Data) {
         Self::init(include_str!("test_inputs/test01.txt"))
@@ -17,16 +17,40 @@ impl DayImpl<Data> for Day<CURRENT_DAY> {
             Self {},
             input
                 .lines()
-                .map(|v| v.parse::<u64>().expect("error while parsing input."))
-                .collect(),
+                .map(|v| {
+                    v.split_whitespace()
+                        .map(|v| v.trim().parse::<u64>().expect("Error during parsing"))
+                        .collect::<Vec<u64>>()
+                        .try_into()
+                        .expect("Error during parsing")
+                })
+                .collect::<Vec<[u64; 2]>>(),
         )
     }
 
     fn one(&self, data: &mut Data) -> Answer {
-        Answer::Number(data.len() as u64)
+        let mut left = data.iter().map(|v| v[0]).collect::<Vec<u64>>();
+        let mut right = data.iter().map(|v| v[1]).collect::<Vec<u64>>();
+
+        left.sort();
+        right.sort();
+
+        Answer::Number(
+            left.into_iter()
+                .zip(right.into_iter())
+                .map(|(a, b)| a.abs_diff(b))
+                .sum(),
+        )
     }
 
     fn two(&self, data: &mut Data) -> Answer {
-        Answer::Number(data.len() as u64)
+        let mut left = data.iter().map(|v| v[0]).collect::<Vec<u64>>();
+        let mut right = data.iter().map(|v| v[1]).collect::<Vec<u64>>();
+
+        Answer::Number(
+            left.iter()
+                .map(|v| v * right.iter().filter(|n| *n == v).count() as u64)
+                .sum(),
+        )
     }
 }
diff --git a/src/days/test_inputs/test01.txt b/src/days/test_inputs/test01.txt
index e69de29..dfca0b1 100644
--- a/src/days/test_inputs/test01.txt
+++ b/src/days/test_inputs/test01.txt
@@ -0,0 +1,6 @@
+3   4
+4   3
+2   5
+1   3
+3   9
+3   3
\ No newline at end of file