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++14 (GCC 5.4.1) (judge verdict: Accepted)

#include <iostream>

int calc(long long start, long long end)
{
    long long a = start;
    int c = 1;
    while(a <= end)
    {
        //std::cout << a << " ";
        a *= 2;
        ++c;
    }
    std::cout << std::endl;
    return c-1;
}

int main(void)
{
    long long s, e;
    std::cin >> s >> e;
    int a = calc(s, e);
    std::cout << a << std::endl;
    return 0;
}