#include "bits/stdc++.h"

#define rep(a,b) for(int a = 0;a < b;a++)
#define REP(i, x, n) for(int i = x; i < n; i++)
#define P(a) cout << a << endl
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
int dx[] = { 1, -1 , 0 , 0 };
int dy[] = { 0,  0,  1, -1 };
ll MOD = 1000000007;
unsigned long long str_to_int(std::string str) {
  unsigned long long ret;
  std::stringstream ss; ss << str;
  ss >> ret;
  return ret;
}

int main() {
  	int n;
  	cin >> n;
  	vector<ll> v;
  	rep(i,n){
		int a;
		cin >> a;
		v.push_back(a);
  	}
	ll left = -1e9,right = 1e9;
	rep(i,100){
		ll ml = (left*2 + right)/3,mr = (left + right*2)/3;
		ll sum1 = 0,sum2 = 0;
		rep(i,n){
			sum1 += abs(v[i]-ml);
			sum2 += abs(v[i]-mr);
		}
		if(sum1 < sum2){
			right = mr;
		}else{
			left = ml;
		}
	}
	ll mini = 1e18;
	for(int i = left;i <= right;i++){
		ll sum = 0;
		rep(j,n){
			sum += abs(v[j]-i);
		}
		mini = min(mini,sum);
	}
	P(mini);
}