using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static int NN => int.Parse(ReadLine());
    static int[] NList => ReadLine().Split().Select(int.Parse).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var n = NN;
        var y = NList;
        var max = 10001;
        var dp = new int[n][];
        var INF = int.MaxValue / 2;
        for (var i = 0; i < n; ++i)
        {
            dp[i] = new int[max];
            if (i == 0)
            {
                for (var j = 0; j < dp[i].Length; ++j) dp[i][j] = Math.Abs(j - y[i]);
            }
            else
            {
                var min = dp[i - 1][0];
                for (var j = 0; j < dp[i].Length; ++j)
                {
                    min = Math.Min(min, dp[i - 1][j]);
                    dp[i][j] = Math.Min(INF, min + Math.Abs(j - y[i]));
                }
            }
        }
        WriteLine(dp[^1].Min());
    }
}