#![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