9840: ABC302 —— A - Attack
[Creator : ]
Description
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?
At least how many times do you need to attack the enemy to make its stamina $0$ or less?
Input
The input is given from Standard Input in the following format:
```
$A$ $B$
```
```
$A$ $B$
```
Output
Print the answer.
Constraints
- $1 \le A,B \le 10^{18}$
- $A$ and $B$ are integers.
- $A$ and $B$ are integers.
Sample 1 Input
7 3
Sample 1 Output
3
Attacking three times make the enemy's stamina -2.
Attacking only twice makes the stamina 1, so you need to attack it three times.
Sample 2 Input
123456789123456789 987654321
Sample 2 Output
124999999
Sample 3 Input
999999999999999998 2
Sample 3 Output
499999999999999999