AdventOfCode2022/04/main.rs

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2.1 KiB
Rust
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#![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<P>(filename: P) -> io::Result<io::Lines<io::BufReader<File>>>
where
P: AsRef<Path>,
{
// 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") {
let mut overlaps = 0;
for line in lines {
if let Ok(ranges) = line {
let v: Vec<Vec<i8>> = ranges
.split(",")
.map(|r| r.split("-").map(|i| i.parse::<i8>().unwrap()).collect())
.collect();
// 00 ... 01
// 10 ... 11
if (v[0][0] <= v[1][0] && v[0][1] >= v[1][1])
|| (v[1][0] <= v[0][0] && v[1][1] >= v[0][1])
{
overlaps += 1;
}
}
}
println!("{}", overlaps);
}
}
fn part_two() {
if let Ok(lines) = read_lines("./inputs/input") {
let mut overlaps = 0;
for line in lines {
if let Ok(ranges) = line {
let v: Vec<Vec<i8>> = ranges
.split(",")
.map(|r| r.split("-").map(|i| i.parse::<i8>().unwrap()).collect())
.collect();
// 00 ... 01
// 10 ... 11
// uuuuuugh
if (v[0][0] <= v[1][0] && v[0][1] >= v[1][1])
|| (v[1][0] <= v[0][0] && v[1][1] >= v[0][1])
|| (v[0][0] <= v[1][1] && v[0][0] >= v[1][0])
|| (v[0][1] >= v[1][0] && v[0][1] <= v[1][1])
{
overlaps += 1;
}
}
}
println!("{}", overlaps);
}
}