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: Wrong Answer)

#include <iostream> // cout, endl, cin
#include <string> // string, to_string, stoi
#include <vector> // vector
#include <queue>
#include <algorithm>
#include <cmath>
using namespace std;

#define rep(i,n)for(int i=0; i<(int)(n); i++)
#define bitrep(tmp, N)for (int tmp=0; tmp < (1<<N);tmp++)
#define all(v) v.begin(), end.bigin()

int INF = 10e9;
using P = pair<int,int>;


int main(){
  int X, Y, cnt=0;
  cin >> X >> Y;
  while(X<=Y){
    cnt++;
    X*=2;
  }
}