#include<bits/stdc++.h>
#define ll long long
using namespace std;

int n;
int a[100001];

inline bool check(ll m1,ll m2){
  ll sum1=0,sum2=0;
  for(int i=0;i<n;i++){
    sum1+=abs(m1-a[i]);
    sum2+=abs(m2-a[i]);
  }
  if(sum1>=sum2)return 1;
  else return 0;
}

int main(){
  cin>>n;
  for(int i=0;i<n;i++){
    cin>>a[i];
  }
  int cont=0;
  ll l=-1000000000,r=1000000000;
  while(cont<80){
    ll mid1=(r+2*l)/3;
    ll mid2=(l+2*r)/3;
    //cerr<<mid1<<" "<<mid2<<endl;
    if(check(mid1,mid2)){
      l=mid1;
    }else{
      r=mid2;
    }
    cont++;
  }
  ll ans=(ll)1e15;
  for(int i=l;i<=r;i++){
    ll nowsum=0;
    for(int j=0;j<n;j++){
      nowsum+=abs(i-a[j]);
    }
    ans=min(ans,nowsum);
  }
  cout<<ans<<endl;
  return 0;
}