Day 1 done

.gitignore

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+/target

Cargo.lock

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+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "AoC2022"
+version = "0.1.0"

Cargo.toml

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+[package]
+name = "AoC2022"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

src/bin/day1.rs

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+use std::error::Error;
+use std::fs::File;
+use std::io::{self, BufRead};
+use std::vec::Vec;
+
+fn main() -> Result<(), Box<dyn Error>> {
+    let file = File::open("inputs/day1.txt")?;
+    let lines = io::BufReader::new(file).lines().map(|l| l.unwrap());
+
+    let mut elves = Vec::<Vec<u32>>::new();
+
+    let mut current_elf = Vec::<u32>::new();
+    for line in lines {
+        if line != "" {
+            let calories = line.parse().unwrap();
+            current_elf.push(calories);
+        } else {
+            elves.push(current_elf);
+            current_elf = Vec::<u32>::new();
+        }
+    }
+
+    let mut calories_per_elf: Vec<u32> = elves
+        .iter()
+        .map(|e| e.iter().fold(0, |a, b| a + b))
+        .collect();
+
+    calories_per_elf.sort();
+    calories_per_elf.reverse();
+
+    println!("Answer Part1: {}", calories_per_elf[0]);
+
+    let answer2 = calories_per_elf[0] + calories_per_elf[1] + calories_per_elf[2];
+
+    println!("Answer Part2: {}", answer2);
+
+    Ok(())
+}