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Score : $100$ points

### Problem Statement

Serval is fighting with a monster.

The health of the monster is $H$.

In one attack, Serval can decrease the monster's health by $A$. There is no other way to decrease the monster's health.

Serval wins when the monster's health becomes $0$ or below.

Find the number of attacks Serval needs to make before winning.

### Constraints

• $1 \leq H \leq 10^4$
• $1 \leq A \leq 10^4$
• All values in input are integers.

### Input

Input is given from Standard Input in the following format:

$H$ $A$


### Output

Print the number of attacks Serval needs to make before winning.

### Sample Input 1

10 4


### Sample Output 1

3

• After one attack, the monster's health will be $6$.
• After two attacks, the monster's health will be $2$.
• After three attacks, the monster's health will be $-2$.

Thus, Serval needs to make three attacks to win.

### Sample Input 2

1 10000


### Sample Output 2

1


### Sample Input 3

10000 1


### Sample Output 3

10000