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#![allow(dead_code)]
#![allow(unused_variables)]
#![allow(unused_mut)]
use std::env;
use std::fs::File;
use std::io::Read;
fn main() {
let args: Vec<String> = env::args().collect();
let filename = if args.len() == 1 {
"in/".to_owned() + args[0].split('/').last().unwrap() + ".pzl"
} else {
args[1].clone()
};
let mut f = File::open(filename).expect("cannot open file");
let mut content = String::new();
f.read_to_string(&mut content).expect("cannot read file");
let lines = content.trim_end().split("\n");
let mut va: Vec<i32> = Vec::new();
let mut vb: Vec<i32> = Vec::new();
for line in lines {
let (a, b) = line.split_once(" ").unwrap();
va.push(a.parse().unwrap());
vb.push(b.parse().unwrap());
//println!("{} {}", l, r);
}
let mut vas = va.clone();
let mut vbs = vb.clone();
vas.sort();
vbs.sort();
let res1 = vas
.iter()
.zip(vbs.iter())
.map(|(a, b)| (a - b).abs())
.fold(0, |a, b| a + b);
let res2 = va
.iter()
.map(|a| *a * (vb.iter().filter(move |b| *b == a).collect::<Vec<_>>().len() as i32))
.fold(0, |a, b| a + b);
println!("res1: {}", res1);
println!("res2: {:?}", res2);
assert_eq!(res1, 2970687);
assert_eq!(res2, 23963899);
}
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