second day

README.md

@@ -1,3 +1,2 @@
-# aoc
+# Advent of Code
-
+My attempt to these festival coding challenges. Written in Rust.
-Advent of Code - solutions in Rust

src/aoc2021/day02/mod.rs

@@ -0,0 +1,41 @@
+pub fn task_one(input: &str) -> String {
+    let mut horizontal_pos: usize = 0;
+    let mut depth: usize = 0;
+
+    for line in input.lines() {
+        let split = line.split_once(' ').unwrap();
+        let amount = split.1.trim().parse::<usize>().unwrap();
+
+        match split.0 {
+            "forward" => horizontal_pos = horizontal_pos + amount,
+            "down" => depth = depth + amount,
+            "up" => depth = depth - amount,
+            _ => panic!()
+        }
+    }
+
+    return (horizontal_pos * depth).to_string();
+}
+
+pub fn task_two(input: &str) -> String {
+    let mut horizontal_pos: usize = 0;
+    let mut depth: usize = 0;
+    let mut aim: usize = 0;
+
+    for line in input.lines() {
+        let split = line.split_once(' ').unwrap();
+        let amount = split.1.trim().parse::<usize>().unwrap();
+
+        match split.0 {
+            "forward" => {
+                horizontal_pos = horizontal_pos + amount;
+                depth = depth + aim * amount;
+            },
+            "down" => aim = aim + amount,
+            "up" => aim = aim - amount,
+            _ => panic!()
+        }
+    }
+
+    return (horizontal_pos * depth).to_string();
+}

src/aoc2021/mod.rs

@@ -1 +1,2 @@
 pub mod day01;
+pub mod day02;

src/main.rs

@@ -7,5 +7,10 @@ fn main() {
     let input_day01 = fs::read_to_string("src/aoc2021/day01/input.txt").expect("Error on reading file.");
     let result_day01_task1 = aoc2021::day01::task_one(&input_day01);
     let result_day01_task2 = aoc2021::day01::task_two(&input_day01);
-    println!("AOC2021 Day 01 \t Task 1: {}, Task 2: {}", result_day01_task1, result_day01_task2);
+    println!("AOC2021 Day 01 \t Task 1: {},\t\tTask 2: {}", result_day01_task1, result_day01_task2);
+
+    let input_day02 = fs::read_to_string("src/aoc2021/day02/input.txt").expect("Error on reading file.");
+    let result_day02_task1 = aoc2021::day02::task_one(&input_day02);
+    let result_day02_task2 = aoc2021::day02::task_two(&input_day02);
+    println!("AOC2021 Day 02 \t Task 1: {},\tTask 2: {}", result_day02_task1, result_day02_task2);
 }