Attack

题目描述

There is an enemy with stamina $A$. Every time you attack the enemy, its stamina reduces by $B$. 至少你需要攻击敌人多少次才能使其耐力变为 $0$ 或更低？

输入格式

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

输出格式

Print the answer.

7 3

3

123456789123456789 987654321

124999999

999999999999999998 2

499999999999999999

提示

$1 \le A,B \le 10^{18}$ $A$ 和 $B$ 是整数。Attacking three times make the enemy's stamina $-2$. Attacking only twice makes the stamina $1$, so you need to attack it three times.

标签: AtCoder|abc302A

来源

AtCoder|abc302A