#![allow(unused_imports)]
use std::io::{ self, Write };
use std::str::FromStr;
use std::cmp::{ min, max };
use std::collections::{ BinaryHeap, VecDeque };

#[allow(unused_macros)]
macro_rules! trace {
    ($var:expr) => {
        let _ = writeln!(&mut std::io::stderr(), ">>> {} = {:?}", stringify!($var), $var);
    };
    ($($args:expr),*) => { trace!(($($args),*)) }
}

const M: usize = 1_000_000_007;

fn sum(ys: &Vec<i64>, r: i64) -> i64 {
    let mut s = 0;
    for &y in ys.iter() { s += abs(y - r); }
    s
}

fn minimum(ys: &Vec<i64>) -> i64 {
    let mut s = ys[0];
    for i in 1..ys.len() { s = min(s, ys[i]); }
    s
}

fn maximum(ys: &Vec<i64>) -> i64 {
    let mut s = ys[0];
    for i in 1..ys.len() { s = max(s, ys[i]); }
    s
}

fn abs(x: i64) -> i64 {
    if x < 0 { -x } else { x }
}

fn main() {
    let mut sc = Scanner::new();
    let n: usize = sc.cin();
    let mut ys = vec![0; n];
    for i in 0..n { ys[i] = sc.cin(); }

    let mut left = minimum(&ys);
    let mut right = maximum(&ys);

    for _ in 0..1000 {
        let r1 = (left * 2 + right) / 3;
        let r2 = (left + right * 2) / 3;
        let s1 = sum(&ys, r1);
        let s2 = sum(&ys, r2);
        if s1 < s2 {
            right = r2;
        } else {
            left = r1;
        }
    }

    let mut ans = sum(&ys, 0);
    for r in (left-10)..(right+10) {
        let s = sum(&ys, r);
        ans = min(ans, s);
    }
    println!("{}", ans);
}

#[allow(dead_code)]
struct Scanner { stdin: io::Stdin, buffer: VecDeque<String>, }
#[allow(dead_code)]
impl Scanner {
    fn new() -> Scanner { Scanner { stdin: io::stdin(), buffer: VecDeque::new() } }
    fn reserve(&mut self) {
        while self.buffer.len() == 0 {
            let mut line = String::new();
            let _ = self.stdin.read_line(&mut line);
            for w in line.split_whitespace() {
                self.buffer.push_back(String::from(w));
            }
        }
    }
    fn cin<T: FromStr>(&mut self) -> T {
        self.reserve();
        match self.buffer.pop_front().unwrap().parse::<T>() {
            Ok(a) => a,
            Err(_) => panic!("parse err")
        }
    }
}