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


int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    ll N;
    cin>>N;
    vector<ll> DP(N+1,1e18);
    DP[0]=0;
    for(int i=0;i<N;i++){
        ll Y;
        cin>>Y;
        ll M=1e18;
        for(int j=0;j<=10000;j++){
            M=min(M,DP[j]);
            DP[j]=M+abs(j-Y);
        }
    }
    ll an=1e18;
    for(int i=0;i<10001;i++)an=min(an,DP[i]);
    cout<<an<<endl;

}