AT_abc434_a [ABC434A] Balloon Trip

Given integers $ W $ and $ B $ , solve the following problem. Takahashi's weight is $ W {\rm [kg]} $ . (Note that the unit is $ {\rm kg} $ .) An object attached with $ n $ balloons will fly into the sky if and only if the mass of the object is **strictly less than** $ nB $ $ {\rm [g]} $ . What is the minimum number of balloons needed to make Takahashi fly into the sky?

The input is given from Standard Input in the following format: > $ W $ $ B $

Output the answer.

### Sample Explanation 1 Takahashi's weight is $ 80 $ $ {\rm kg} $ $ = $ $ 80000 $ $ {\rm g} $ . If he is attached with $ 16001 $ balloons, his mass is less than $ 16001 \times 5=80005 $ $ {\rm g} $ , so he will fly into the sky. Note that $ 16000 $ balloons are not sufficient. ### Constraints - $ 1 \le W \le 100 $ - $ 1 \le B \le 100 $ - All input values are integers.