Update LICENSE

Forgot that the default license provided by Gitea is a template and needs to be filled out *facepalm*

LICENSE

@@ -1,4 +1,4 @@
-Copyright (c) <year> <owner> 
+Copyright (c) 2022, apio 
 
 Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
 

src/main.rs

@@ -1,3 +1,48 @@
-fn main() {
-    println!("Hello, world!");
+// https://adventofcode.com/2022/day/1
+
+const DATA: &'static str = include_str!("input.txt");
+
+fn parse_calories_per_elf(elf: &str) -> i32 {
+    let mut elf_sum = 0;
+    for food_item in elf.split("\n")
+    {
+        elf_sum += food_item.parse().unwrap_or(0);
+    }
+    elf_sum
+}
+
+#[allow(dead_code)]
+fn part1() {
+    let mut highest_sum = 0;
+    for elf in DATA.split("\n\n")
+    {
+        let elf_sum = parse_calories_per_elf(elf);
+        if elf_sum > highest_sum {
+            highest_sum = elf_sum;
+        }
+    }
+    println!("The elf carrying the most calories carries {} calories", highest_sum);
+}
+
+fn part2() {
+    let mut elves: Vec<i32> = Vec::new();
+
+    for elf in DATA.split("\n\n")
+    {
+        let elf_sum = parse_calories_per_elf(elf);
+        elves.push(elf_sum);
+    }
+
+    elves.sort();
+
+    // Get the 3 elves carrying more calories
+    let slice = &elves[elves.len()-3 ..];
+
+    println!("The 3 elves carrying the most calories carry {} calories", slice.iter().sum::<i32>());
+}
+
+fn main()
+{
+    //part1();
+    part2();
 }