Prepare for 3!

Cargo.toml

@@ -2,7 +2,7 @@
 name = "aoc-vv"
 version = "0.1.0"
 edition = "2021"
-default-run = "p02"
+default-run = "p03"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 

src/bin/p03.rs

@@ -0,0 +1,26 @@
+use std::fs;
+use std::io::{self, BufRead, Read, Seek};
+
+fn main() {
+    let filename = "etc/p03.txt";
+    let file = fs::File::open(filename).expect("Can't open file");
+    let mut reader = io::BufReader::new(file);
+
+    println!("PART ONE ---------------");
+    part1(reader.by_ref().lines());
+    reader.rewind().expect("Can't rewind");
+
+    println!("\n PART TWO ---------------");
+    part2(reader.lines());
+}
+
+fn part1(lines: impl Iterator<Item = std::io::Result<String>>) {
+}
+
+fn part2(lines: impl Iterator<Item = std::io::Result<String>>) {
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+}