using System;

namespace AtCoder.Problems
{
    public class ProblemE
    {
        public static void Main(string[] args)
        {
            var s = new SolveE();
            s.Solve();
        }

        public class Scanner
        {
            private string[] _s;
            private int _i;
            private readonly char[] _separators = new char[] { ' ' };

            public Scanner()
            {
                _s = new string[0];
                _i = 0;
            }

            public string Next()
            {
                if (_i < _s.Length) return _s[_i++];
                string st = Console.ReadLine();
                while (st == "") st = Console.ReadLine();
                _s = st.Split(_separators, StringSplitOptions.RemoveEmptyEntries);
                if (_s.Length == 0) return Next();
                _i = 0;
                return _s[_i++];
            }

            public int NextInt() => int.Parse(Next());
            public long NextLong() => long.Parse(Next());
            public ulong NextULong() => ulong.Parse(Next());
            public double NextDouble() => double.Parse(Next());

            public int[] GetIntArray(int n, int add = 0)
            {
                int[] array = new int[n];
                for (int i = 0; i < n; i++)
                {
                    array[i] = NextInt() + add;
                }
                return array;
            }

            public long[] GetLongArray(int n, long add = 0)
            {
                long[] array = new long[n];
                for (int i = 0; i < n; i++)
                {
                    array[i] = NextLong() + add;
                }
                return array;
            }

            public double[] GetDoubleArray(int n, double add = 0)
            {
                double[] array = new double[n];
                for (int i = 0; i < n; i++)
                {
                    array[i] = NextDouble() + add;
                }
                return array;
            }
        }
    }

    public class SolveE
    {
        public void Solve()
        {
            var cin = new ProblemE.Scanner();
            var n = cin.NextInt();
            var a = cin.GetIntArray(n);

            var result = GetAnswer(n, a);
            Console.WriteLine(result);
        }

        public long GetAnswer(int n, int[] a)
        {
            var answer = 0L;
            var flag = false;
            for (int i = 0; i < n; ++i)
            {
                var x = flag ? i / 2 : n - 1 - i / 2;
                flag = !flag;
                
                var max = 0;
                var maxIndex = x;
                for (int y = 0; y < n; y++)
                {
                    var v = a[y] * Math.Abs(x - y);
                    if (max < v)
                    {
                        max = v;
                        maxIndex = y;
                    }
                }
                answer += max;
                a[maxIndex] = 0;
            }
            return answer;
        }
    }
}
