54 lines
1.3 KiB
Rust
54 lines
1.3 KiB
Rust
use itertools::Itertools;
|
|
use std::collections::HashSet;
|
|
use std::error::Error;
|
|
use std::fs::File;
|
|
use std::io::{self, BufRead};
|
|
use std::vec::Vec;
|
|
|
|
fn main() -> Result<(), Box<dyn Error>> {
|
|
let file = File::open("inputs/day4.txt")?;
|
|
let lines = io::BufReader::new(file).lines().map(|l| l.unwrap());
|
|
|
|
let sections: Vec<((u32, u32), (u32, u32))> = lines
|
|
.map(|l| {
|
|
l.split(',')
|
|
.map(|p| {
|
|
p.split('-')
|
|
.map(|id| id.parse::<u32>().unwrap())
|
|
.collect_tuple()
|
|
.unwrap()
|
|
})
|
|
.collect_tuple()
|
|
.unwrap()
|
|
})
|
|
.collect();
|
|
|
|
let count1 = sections
|
|
.iter()
|
|
.map(|((a, b), (x, y))| {
|
|
if (a >= x && b <= y) || (x >= a && y <= b) {
|
|
1
|
|
} else {
|
|
0
|
|
}
|
|
})
|
|
.fold(0, |a, b| a + b);
|
|
|
|
println!("Answer Part1: {}", count1);
|
|
|
|
let count2 = sections
|
|
.iter()
|
|
.map(|((a, b), (x, y))| {
|
|
if (a <= x && x <= b) || (x <= a && a <= y) {
|
|
1
|
|
} else {
|
|
0
|
|
}
|
|
})
|
|
.fold(0, |a, b| a + b);
|
|
|
|
println!("Answer Part2: {}", count2);
|
|
|
|
Ok(())
|
|
}
|