feat: day 1

src/bin/day_1.rs

@@ -0,0 +1,35 @@
+use color_eyre::{eyre::eyre, Result};
+
+fn parse(s: String) -> Result<Vec<(usize, usize)>> {
+    let mut elves = vec![];
+
+    let mut current_elf = 1;
+    let mut current_sum = 0;
+
+    for line in s.lines() {
+        if line.is_empty() {
+            elves.push((current_elf, current_sum));
+            current_elf += 1;
+            current_sum = 0;
+        } else {
+            current_sum += line.parse::<usize>()?;
+        }
+    }
+
+    Ok(elves)
+}
+
+fn main() -> Result<()> {
+    let mut input = aoc_2022::load_data(1, parse)?;
+
+    input.sort_by_key(|(_, sum)| *sum);
+    let max = input[input.len() - 1].1;
+
+    println!("The most calories carried by one elf is {max}!");
+
+    let top_three = input[input.len() - 1].1 + input[input.len() - 2].1 + input[input.len() - 3].1;
+
+    println!("The top three elves are carring {top_three} calories!");
+
+    Ok(())
+}