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.