#nullable enable

#region
var _input = Array.Empty<string>();
var _iter = 0;
string String()
{
    while (_iter >= _input.Length) (_input, _iter) = (Console.ReadLine()!.Split(' '), 0);
    return _input[_iter++];
}
T I<T>() where T : IParsable<T> => T.Parse(String(), null);
#endregion

static T[] Range<T>(int n, Func<T> F) => Enumerable.Range(0, n).Select(_ => F()).ToArray();

var n = I<int>();
var az = Range(n, I<int>);
az.AsSpan().Sort();
if (n >= 3 && Math.Abs(az[1]) > Math.Abs(az[^1]))
{
    var bz = new int[n];
    bz[0] = az[0];
    for (var i = 1; i < n - 1; i++) bz[i] = az[i + 1];
    bz[^1] = az[1];
    az = bz;
}
var ans = 0L;
for (var i = 1; i < n; i++)
{
    var x = az[i - 1];
    var y = az[i];
    if (x < 0 && y < 0) ans += -x - y;
    else ans += Math.Abs(x - y);
}
Console.WriteLine(ans);