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 PHP (5.6.30) (judge verdict: Accepted)

<?php
//error_reporting(0);
//$A = explode(" ",trim(fgets(STDIN)));
//$s = trim(fgets(STDIN));
list($X,$Y) = explode(" ",trim(fgets(STDIN)));
$sum=0;
$num=$X;
while(1) {
  if ($num>$Y) break;
  $num=$num*2;
  $sum++;
}
printf("%d\n",$sum);