basic project structure and first day in 2021

.gitignore

@@ -11,3 +11,8 @@ Cargo.lock
 # These are backup files generated by rustfmt
 **/*.rs.bk
 
+
+
+# Added by cargo
+
+/target

Cargo.toml

@@ -0,0 +1,8 @@
+[package]
+name = "aoc"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]

src/aoc2021/day01/mod.rs

@@ -0,0 +1,60 @@
+pub fn task_one(input: &str) -> String {
+    let mut counter: usize = 0;
+
+    let mut last_line: String = String::new();
+
+    for line in input.lines() {
+        if last_line.is_empty() {
+            last_line = line.to_string();
+            continue
+        } else {
+            if last_line.parse::<usize>().unwrap() < line.parse::<usize>().unwrap() {
+                counter = counter + 1;
+            }
+
+            last_line = line.to_string();
+        }
+    }
+
+    return counter.to_string();
+}
+
+pub fn task_two(input: &str) -> String {
+    let mut counter: usize = 0;
+
+    let mut top_line: String = String::new();
+    let mut middle_line: String = String::new();
+    let mut last_line: String = String::new();
+
+    let mut current_frame: usize;
+    let mut last_frame: usize = 0;
+
+    for (i, line) in input.lines().enumerate() {
+        match i {
+            0 => top_line = line.to_string(),
+            1 => middle_line = line.to_string(),
+            2 => last_line = line.to_string(),
+            _ => {
+                current_frame = top_line.parse::<usize>().unwrap() + middle_line.parse::<usize>().unwrap() + last_line.parse::<usize>().unwrap();
+
+                if  last_frame != 0 && last_frame < current_frame {
+                    counter = counter + 1;
+                }
+                
+                last_frame = current_frame;
+
+                top_line = middle_line;
+                middle_line = last_line;
+                last_line = line.to_string();
+            },
+        }
+        // println!("{}\t\t {}\t{}\t{}\t current_frame: {}", i, top_line, middle_line, last_line, current_frame);
+    }
+
+    current_frame = top_line.parse::<usize>().unwrap() + middle_line.parse::<usize>().unwrap() + last_line.parse::<usize>().unwrap();
+    if last_frame < current_frame {
+        counter = counter + 1;
+    }
+
+    return counter.to_string();
+}

src/aoc2021/mod.rs

@@ -0,0 +1 @@
+pub mod day01;

src/main.rs

@@ -0,0 +1,11 @@
+mod aoc2021;
+
+use std::fs;
+
+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);
+}