package main

import (
	"fmt"
	"log"
)

var N int
var Y []int

func main() {
	fmt.Scan(&N)
	Y = make([]int, N)
	for i := 0; i < N; i++ {
		fmt.Scan(&Y[i])
	}
	maxY := max(Y)
	lb := -1
	ub := maxY
	for ub-lb > 1 {
		mid := (ub + lb) / 2
		if cal(lb) < cal(ub) {
			ub = mid
		} else {
			lb = mid
		}
	}
	log.Println(lb)
	log.Println(cal(lb + 1))
	log.Println(cal(5), cal(6), cal(7))
	fmt.Println(cal(lb + 1))
}

func cal(m int) int {
	r := 0
	for i := range Y {
		r += abs(m - Y[i])
	}
	return r
}

func max(n []int) int {
	r := n[0]
	for i := range n {
		if r < n[i] {
			r = n[i]
		}
	}
	return r
}

func abs(a int) int {
	if a > 0 {
		return a
	}
	return -a
}