Problem:
Score : 300 points

Problem Statement

As a token of his gratitude, Takahashi has decided to give his mother an integer sequence.
The sequence A needs to satisfy the conditions below:

A consists of integers between X and Y (inclusive).

For each 1\leq i \leq |A|-1, A_{i+1} is a multiple of A_i and strictly greater than A_i.

Find the maximum possible length of the sequence.

Constraints

1 \leq X \leq Y \leq 10^{18}

All input values are integers.

Input

Input is given from Standard Input in the following format:

X Y

Output

Print the maximum possible length of the sequence.

Sample Input 1

3 20

Sample Output 1

3

The sequence 3,6,18 satisfies the conditions.

Sample Input 2

25 100

Sample Output 2

3

Sample Input 3

314159265 358979323846264338

Sample Output 3

31

Solution in C# (.NET Core 3.1.201) (judge verdict: Accepted)

using System;

class Program
{
	static void Main()
	{
		var xy = Array.ConvertAll(Console.ReadLine().Split(new[] { ' ' }), number => long.Parse(number));
		var x = xy[0];
		var y = xy[1];

		var count = 0;
		for (var i = x; i <= y; i *= 2) {
			++count;
		}

		Console.WriteLine(count);
	}
}