From 11b2addf4b5fe5bcf161dc9f4b6bd7b0b165b31d Mon Sep 17 00:00:00 2001
From: JonOfUs <jonofus@flueren.eu>
Date: Sun, 1 Dec 2024 10:47:47 +0100
Subject: [PATCH] day01

---
 res/01/input    | 1000 +++++++++++++++++++++++++++++++++++++++++++++++
 src/days/d01.rs |   30 +-
 src/main.rs     |    1 -
 3 files changed, 1027 insertions(+), 4 deletions(-)
 create mode 100644 res/01/input

diff --git a/res/01/input b/res/01/input
new file mode 100644
index 0000000..60b222d
--- /dev/null
+++ b/res/01/input
@@ -0,0 +1,1000 @@
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+33628   38645
+67211   57264
+24757   20323
+73181   35191
+24567   76180
+84081   15390
+34345   10519
+21185   17015
+33414   96823
+30310   72888
+24352   57264
+56004   14161
+14492   39140
+47871   75255
+42912   92034
+91823   36007
+46731   73158
+24112   74778
+92034   95808
+77157   89301
+29215   99938
+37580   89301
+73593   36007
+11075   96823
+49084   34885
diff --git a/src/days/d01.rs b/src/days/d01.rs
index 0d1245b..0ac5e42 100644
--- a/src/days/d01.rs
+++ b/src/days/d01.rs
@@ -1,10 +1,34 @@
-use std::collections::HashMap;
 use std::fs;
 
 pub fn solve() {
     let path = "res/01/input";
 
-    println!("Result 1: {}", 42);
+    let contents = fs::read_to_string(path).expect("Something went wrong reading the file");
 
-    println!("Result 2: {}", 42);
+    let mut numbers1 = Vec::<usize>::new();
+    let mut numbers2 = Vec::<usize>::new();
+
+    for line in contents.lines() {
+        let (n1, n2) = line.split_once("   ").unwrap();
+        numbers1.push(n1.parse::<usize>().unwrap());
+        numbers2.push(n2.parse::<usize>().unwrap());
+    }
+
+    numbers1.sort();
+    numbers2.sort();
+
+    let result: usize = numbers1
+        .iter()
+        .enumerate()
+        .map(|(i, n)| n.abs_diff(numbers2[i]))
+        .sum();
+
+    println!("Result 1: {}", result);
+
+    let result: usize = numbers1
+        .iter()
+        .map(|n| numbers2.iter().filter(|n2| n == *n2).count() * n)
+        .sum();
+
+    println!("Result 2: {}", result);
 }
diff --git a/src/main.rs b/src/main.rs
index 816580d..e6254f3 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,5 +1,4 @@
 pub mod days;
-#[macro_use]
 extern crate scan_fmt;
 
 use std::time::Instant;