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 (GCC 9.2.1) (judge verdict: Accepted)

#include <stdio.h>

long long       X;
long long       Y;

int             main(void)
{
        long long       num;
        int                     count = 1;

        scanf("%lld%lld", &X, &Y);
        num = 2 * X;
        while (num <= Y)
        {
                count++;
                num *= 2;
        }
        printf("%d\n", count);
        return (0);
}