#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 hz = Range(n, I<long>);
Array.Sort(hz);
var l = Math.Min(61, n);
hz = hz[..l];
var ans = int.MaxValue;
for (var i = 60; i >= 0; i--)
{
    var q = new PriorityQueue<long, long>();
    foreach (var h in hz) q.Enqueue(h, -h);
    for (var j = i; j >= 0; j--)
    {
        if (q.Count == 0) break;
        var h = q.Dequeue();
        h -= 1L << j;
        if (h > 0) q.Enqueue(h, -h);
    }
    if (n > l)
    {
        ans = n - l + i + 1 + q.Count;
        break;
    }
    if (q.Count == 0) ans = Math.Min(ans, i + 1);
}
Console.WriteLine(ans);