feat: Implement day01 und day02 of aoc

Cargo.lock

@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "aoc-2022"
+version = "0.1.0"

src/day01.rs

@@ -0,0 +1,45 @@
+use crate::utils;
+
+pub fn execute_task01(content: &str) {
+    let vector = utils::convert_to_string_slice(&content);
+    let mut sum_vector = collect_all_calories(vector);
+    sort_calories_descending(&mut sum_vector);
+
+    let max: i32 = sum_vector[0];
+
+    println!("Day01 - Task01 - Biggest Calories {}", max)
+}
+
+pub fn execute_task02(content: &str) {
+    let vector = utils::convert_to_string_slice(&content);
+    let mut sum_vector = collect_all_calories(vector);
+    sort_calories_descending(&mut sum_vector);
+
+    let max_three: i32 = sum_vector.iter().take(3).sum();
+
+    println!("Day01 - Task02 - Biggest Calories of top three: {}", max_three);
+}
+
+fn collect_all_calories(list: Vec<&str>) -> Vec<i32> {
+    let mut calories: i32 = 0;
+    let mut calories_list: Vec<i32> = vec![];
+
+    for var in list {
+
+        if var.is_empty() {
+            calories_list.push(calories);
+            calories = 0;
+            continue;
+        }
+
+        calories += var.parse::<i32>().unwrap_or(0);
+    }
+
+    return calories_list;
+}
+
+fn sort_calories_descending(vec: &mut Vec<i32>) {
+    vec.sort_by_key(|a|
+
+        std::cmp::Reverse(*a));
+}

src/day02.rs

@@ -0,0 +1,115 @@
+use crate::day02::Move::{Paper, Rock, Scissors};
+use crate::utils;
+
+/*
+First Colum (Opponent):
+A = Rock
+B = Paper
+C = Scissors
+
+Second Colum (You):
+X = Rock
+Y = Paper
+Z = Scissors
+
+Rock > Scissors
+Scissors > Paper
+Paper > Rock
+
+Score:
+Win -> 6
+Draw -> 3
+Loos -> 0
+
+Rock (X) -> 1
+Paper (Y) -> 2
+Scissors (Z) -> 3
+ */
+
+#[derive(Clone, Copy)]
+enum Move {
+    Rock,
+    Paper,
+    Scissors
+}
+
+pub fn execute_task01(content: &str) {
+    let vector = utils::convert_to_string_slice(&content);
+    let score: i32 = vector.into_iter().map(|line| {
+        let opp_char: char = line.chars().nth(0).unwrap();
+        let you_char: char = line.chars().nth(2).unwrap();
+
+        calculate_score_from_game(convert_to_move(opp_char), convert_to_move(you_char))
+    }).sum();
+
+    println!("Day02 - Task01 - Score: {}", score);
+
+}
+
+
+pub fn execute_task02(content: &str) {
+    let vector = utils::convert_to_string_slice(&content);
+    let score: i32 = vector.into_iter().map(|line| {
+        let opp_char: char = line.chars().nth(0).unwrap();
+        let you_char: char = line.chars().nth(2).unwrap();
+        let opp_move: Move = convert_to_move(opp_char);
+
+        calculate_score_from_game(opp_move, convert_to_conditional_move(opp_move ,you_char))
+    }).sum();
+
+    println!("Day02 - Task01 - Score: {}", score);
+
+}
+
+fn convert_to_conditional_move(opp: Move, you: char) -> Move {
+    match you {
+        'X' => match opp { // need to loose
+            Rock => Scissors,
+            Paper => Rock,
+            Scissors => Paper,
+        },
+        'Y' => opp, // need to draw
+        'Z' => match opp { // need to win
+            Rock => Paper,
+            Paper => Scissors,
+            Scissors => Rock,
+        },
+        _ => panic!("error"),
+    }
+}
+
+fn convert_to_move(c: char) -> Move {
+    match c {
+        'A' | 'X' => Rock,
+        'B' | 'Y' => Paper,
+        'C' | 'Z' => Scissors,
+        _ => panic!("error"),
+    }
+}
+
+fn calculate_score_from_game(opp: Move, you: Move) -> i32 {
+    match opp {
+        Rock => { // Opp == Rock
+            match you {
+                Rock => 3 + 1, // You Draw with Rock
+                Paper => 6 + 2, // You Win with Paper
+                Scissors => 0 + 3, // You Lose with Scissors
+            }
+        },
+        Paper => { // Opp == Paper
+            match you {
+                Rock => 0 + 1, // You Lose with Rock
+                Paper => 3 + 2, // You Draw with Paper
+                Scissors => 6 + 3, // You Win with Scissors
+            }
+        },
+        Scissors => { // Opp == Scissors
+            match you {
+                Rock => 6 + 1, // You Win with Rock
+                Paper => 0 + 2, // You Lose with Paper
+                Scissors => 3 + 3, // You Draw with Scissors
+            }
+        },
+
+    }
+}

src/main.rs

@@ -1,3 +1,23 @@
+mod utils;
+mod day01;
+mod day02;
+
 fn main() {
-    println!("Hello, world!");
+    let path01 = "input/day01/question01";
+    let content01: String = match utils::load_file_as_string(path01) {
+        Ok(content) => content,
+        Err(error) => panic!("Problem opening the file: {:?}", error),
+    };
+
+    let path02 = "input/day02/question01";
+    let content02: String = match utils::load_file_as_string(path02) {
+        Ok(content) => content,
+        Err(error) => panic!("Problem opening the file: {:?}", error),
+    };
+
+    day01::execute_task01(&content01);
+    day01::execute_task02(&content01);
+
+    day02::execute_task01(&content02);
+    day02::execute_task02(&content02);
 }

src/utils.rs

@@ -0,0 +1,11 @@
+use std::fs;
+use std::error::Error;
+
+pub fn load_file_as_string(path: &str) -> Result<String, Box<dyn Error>> {
+    let content = fs::read_to_string(path)?;
+    Ok(content)
+}
+
+pub fn convert_to_string_slice(content: &str) -> Vec<&str> {
+    content.lines().collect()
+}