chore: import old 2019, 2020 and 2021 solutions into the monorepo

.github/badges/completion2024.json

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+{
+  "schemaVersion": 1,
+  "label": "2024",
+  "message": "10/50",
+  "color": "red",
+  "style": "for-the-badge"
+}

2019/day01/Cargo.toml

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+[package]
+name = "day01_2019"
+version = "0.1.0"
+authors.workspace = true
+repository.workspace = true
+edition.workspace = true
+license.workspace = true
+rust-version.workspace = true
+readme.workspace = true
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[lib]
+name = "day01_2019"
+path = "src/lib.rs"
+
+[dependencies]
+aoc-solution = { path = "../../aoc-solution" }
+aoc-common = { path = "../../common" }
+anyhow = { workspace = true }
+
+[lints]
+workspace = true

2019/day01/src/lib.rs

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+// Copyright 2024 Jedrzej Stuczynski
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// legacy code
+#![allow(clippy::unwrap_used)]
+#![allow(clippy::expect_used)]
+
+use aoc_solution::Aoc;
+
+#[derive(Aoc)]
+pub struct Day01;
+
+struct FuelCalculator {}
+
+impl FuelCalculator {
+    fn required_fuel(mass: u64) -> Option<u64> {
+        match (mass as f64 / 3.0).floor() - 2.0 {
+            f if f <= 0.0 => None,
+            f => Some(f as u64),
+        }
+    }
+}
+
+trait Fuelable {
+    fn calculate_base_required_fuel(&self) -> u64;
+    fn calculate_total_required_fuel(&self) -> u64;
+}
+
+pub struct Module {
+    mass: u64,
+}
+
+impl Module {
+    fn new(mass: u64) -> Self {
+        Self { mass }
+    }
+}
+
+impl Fuelable for Module {
+    fn calculate_base_required_fuel(&self) -> u64 {
+        FuelCalculator::required_fuel(self.mass).unwrap()
+    }
+
+    fn calculate_total_required_fuel(&self) -> u64 {
+        let f = FuelCalculator::required_fuel;
+        std::iter::successors(f(self.mass), |x| f(*x)).sum()
+    }
+}
+
+struct FuelUpper {}
+
+impl FuelUpper {
+    fn determine_total_required_base_fuel<F: Fuelable>(fuelables: &[F]) -> u64 {
+        fuelables
+            .iter()
+            .map(|f| f.calculate_base_required_fuel())
+            .sum()
+    }
+
+    fn determine_total_required_fuel<F: Fuelable>(fuelables: &[F]) -> u64 {
+        fuelables
+            .iter()
+            .map(|f| f.calculate_total_required_fuel())
+            .sum()
+    }
+}
+
+pub fn input_to_modules(inputs: Vec<String>) -> Vec<Module> {
+    inputs
+        .iter()
+        .map(|i| i.parse::<u64>().unwrap())
+        .map(Module::new)
+        .collect()
+}
+
+pub fn do_part1(inputs_modules: &[Module]) {
+    let required_base_fuel = FuelUpper::determine_total_required_base_fuel(inputs_modules);
+    println!("Part 1 answer: {}", required_base_fuel);
+}
+
+pub fn do_part2(input_modules: &[Module]) {
+    let required_total_fuel = FuelUpper::determine_total_required_fuel(input_modules);
+    println!("Part 2 answer: {}", required_total_fuel);
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn module_calculates_correct_base_fuel_for_mass_of_12() {
+        assert_eq!(2, Module::new(12).calculate_base_required_fuel(),);
+    }
+
+    #[test]
+    fn module_calculates_correct_base_fuel_for_mass_of_14() {
+        assert_eq!(2, Module::new(14).calculate_base_required_fuel());
+    }
+
+    #[test]
+    fn module_calculates_correct_base_fuel_for_mass_of_1969() {
+        assert_eq!(654, Module::new(1969).calculate_base_required_fuel());
+    }
+
+    #[test]
+    fn module_calculates_correct_base_fuel_for_mass_of_100756() {
+        assert_eq!(33583, Module::new(100_756).calculate_base_required_fuel());
+    }
+
+    #[test]
+    fn module_calculates_correct_total_fuel_for_mass_of_14() {
+        assert_eq!(2, Module::new(14).calculate_total_required_fuel());
+    }
+
+    #[test]
+    fn module_calculates_correct_total_fuel_for_mass_of_1969() {
+        assert_eq!(966, Module::new(1969).calculate_total_required_fuel());
+    }
+
+    #[test]
+    fn module_calculates_correct_total_fuel_for_mass_of_100756() {
+        assert_eq!(50346, Module::new(100_756).calculate_total_required_fuel());
+    }
+}

2019/day01/src/main.rs

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+// Copyright 2019-2024 Jedrzej Stuczynski
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// legacy code
+#![allow(clippy::unwrap_used)]
+#![allow(clippy::expect_used)]
+
+use day01_2019::{do_part1, do_part2, input_to_modules};
+use std::fs::File;
+use std::io::{BufRead, BufReader};
+
+fn read_input_file(path: &str) -> Vec<String> {
+    let file = File::open(path).unwrap();
+    let reader = BufReader::new(file);
+
+    let mut inputs = vec![];
+    for line in reader.lines() {
+        inputs.push(line.unwrap());
+    }
+
+    inputs
+}
+
+fn main() {
+    let day1_input = read_input_file("inputs/2019/day01");
+    let modules = input_to_modules(day1_input);
+    do_part1(&modules);
+    do_part2(&modules);
+}

2019/day02/Cargo.toml

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+[package]
+name = "day02_2019"
+version = "0.1.0"
+authors.workspace = true
+repository.workspace = true
+edition.workspace = true
+license.workspace = true
+rust-version.workspace = true
+readme.workspace = true
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[lib]
+name = "day02_2019"
+path = "src/lib.rs"
+
+[dependencies]
+aoc-solution = { path = "../../aoc-solution" }
+aoc-common = { path = "../../common" }
+anyhow = { workspace = true }
+
+[lints]
+workspace = true