Operations on number - MarisaOJ: Marisa Online Judge
Operations on number
Time limit: 1000 ms
Memory limit: 256 MB
You are given an integer $n$. Each turn you can perform either operation:
- Multiple $n$ by $2$.
- Subtract $1$ from $n$.
Find the minimum number of operations to turn $n$ to $m$.
### Input
- The first line contains 2 integers $n, m$.
### Output
- Print the minimum number of operations.
### Constraints
- $1 \le n, m \le 10^5$.
### Example
Input:
```
2 7
```
Output:
```
3
```
