競プロ典型 014

https://atcoder.jp/contests/typical90/tasks/typical90_n

小学生と通う小学校を同じ並びにすればよいです。

// We Used to Sing a Song Together
#![allow(non_snake_case)]


//////////////////// library ////////////////////

fn read<T: std::str::FromStr>() -> T {
    let mut line = String::new();
    std::io::stdin().read_line(&mut line).ok();
    line.trim().parse().ok().unwrap()
}

fn read_vec<T: std::str::FromStr>() -> Vec<T> {
    read::<String>().split_whitespace()
            .map(|e| e.parse().ok().unwrap()).collect()
}


//////////////////// process ////////////////////

fn read_input() -> (Vec<i64>, Vec<i64>) {
    let _N: usize = read();
    let A: Vec<i64> = read_vec();
    let B: Vec<i64> = read_vec();
    (A, B)
}
fn F(mut A: Vec<i64>, mut B: Vec<i64>) -> i64 {
    A.sort();
    B.sort();
    A.into_iter().zip(B.into_iter()).
            map(|(a, b)| (a-b).abs()).sum::<i64>()
}

fn main() {
    let (A, B) = read_input();
    println!("{}", F(A, B))
}