There is an enemy with stamina $A$. Every time you attack the enemy, its stamina reduces by $B$. At least how many times do you need to attack the enemy to make its stamina $0$ or less?

The input is given from Standard Input in the following format: >$A$ $B$ #### Constraints - $1 \le A,B \le 10^{18}$ - $A$ and $B$ are integers.

Print the answer.

***For Sample #1:*** ### Sample Output 1 Attacking three times make the enemy's stamina $-2$. Attacking only twice makes the stamina $1$, so you need to attack it three times.

AtCoder [ABC302A]