#![allow(dead_code)] use std::fs::File; use std::io; use std::io::BufRead; use std::path::Path; use std::time::Instant; fn main() { let now = Instant::now(); part_one(); let part_one_duration = now.elapsed(); part_two(); let part_two_duration = now.elapsed(); println!( "p1: {}ms, p2: {}ms", part_one_duration.as_millis(), (part_two_duration - part_one_duration).as_millis() ); } fn read_lines

(filename: P) -> io::Result>> where P: AsRef, { // note that this discards a final newline let file = File::open(filename)?; Ok(io::BufReader::new(file).lines()) } fn part_one() { if let Ok(lines) = read_lines("./inputs/input") { for line in lines { // do stuff } } } fn part_two() {}