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 Perl (v5.18.2) (judge verdict: Wrong Answer)

#!/usr/bin/perl
#arc88_c.pl
#Tue Jan  9 23:04:35 2018
#

use warnings;
use strict;

my $temp = <STDIN>;
my @para = split (" ",$temp);

my $x = $para[0];
my $y = $para[1];

my $answer = int(log($y/$x)/log(2));

print $answer+1,"\n";