102391: [AtCoder]ABC239 B - Integer Division

Problem Statement

Given an integer $X$ between $-10^{18}$ and $10^{18}$ (inclusive), print $\left\lfloor \dfrac{X}{10} \right\rfloor$.

Notes

For a real number $x$, $\left\lfloor x \right\rfloor$ denotes "the maximum integer not exceeding $x$". For example, we have $\left\lfloor 4.7 \right\rfloor = 4, \left\lfloor -2.4 \right\rfloor = -3$, and $\left\lfloor 5 \right\rfloor = 5$. (For more details, please refer to the description in the Sample Input and Output.)

Constraints

• $-10^{18} \leq X \leq 10^{18}$
• All values in input are integers.

Input

Input is given from Standard Input in the following format:

$X$

Output

Print $\left\lfloor \frac{X}{10} \right\rfloor$. Note that it should be output as an integer.

Sample Input 1

47

Sample Output 1

4

The integers that do not exceed $\frac{47}{10} = 4.7$ are all the negative integers, $0, 1, 2, 3$, and $4$. The maximum integer among them is $4$, so we have $\left\lfloor \frac{47}{10} \right\rfloor = 4$.

Sample Input 2

-24

Sample Output 2

-3

Since the maximum integer not exceeding $\frac{-24}{10} = -2.4$ is $-3$, we have $\left\lfloor \frac{-24}{10} \right\rfloor = -3$.
Note that $-2$ does not satisfy the condition, as $-2$ exceeds $-2.4$.

Sample Input 3

50

Sample Output 3

5

The maximum integer that does not exceed $\frac{50}{10} = 5$ is $5$ itself. Thus, we have $\left\lfloor \frac{50}{10} \right\rfloor = 5$.

Sample Input 4

-30

Sample Output 4

-3

Just like the previous example, $\left\lfloor \frac{-30}{10} \right\rfloor = -3$.

Sample Input 5

987654321987654321

Sample Output 5

98765432198765432

The answer is $98765432198765432$. Make sure that all the digits match.

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问题描述

给定一个在$-10^{18}$和$10^{18}$（含）之间的整数$X$，打印$\left\lfloor \dfrac{X}{10} \right\rfloor$。

注意

对于实数$x$，$\left\lfloor x \right\rfloor$表示“不超过$x$的最大整数”。 例如，我们有$\left\lfloor 4.7 \right\rfloor = 4, \left\lfloor -2.4 \right\rfloor = -3$，和$\left\lfloor 5 \right\rfloor = 5$。 (更多详情，请参阅样例输入和输出的描述。)

约束

• $-10^{18} \leq X \leq 10^{18}$
• 输入中的所有值都是整数。

输入

输入通过标准输入给出以下格式：

$X$

输出

打印$\left\lfloor \frac{X}{10} \right\rfloor$。 注意，它应该输出为一个整数。

样例输入1

47

样例输出1

4

不超过$\frac{47}{10} = 4.7$的整数包括所有的负整数、0、1、2、3和4。 其中最大的整数是4，所以我们有$\left\lfloor \frac{47}{10} \right\rfloor = 4$。

样例输入2

-24

样例输出2

-3

因为不超过$\frac{-24}{10} = -2.4$的最大整数是$-3$，所以我们有$\left\lfloor \frac{-24}{10} \right\rfloor = -3$。
注意，$-2$不满足条件，因为$-2$超过了$-2.4$。

样例输入3

50

样例输出3

5

不超过$\frac{50}{10} = 5$的最大整数是5本身。 因此，我们有$\left\lfloor \frac{50}{10} \right\rfloor = 5$。

样例输入4

-30

样例输出4

-3

就像上一个例子一样，$\left\lfloor \frac{-30}{10} \right\rfloor = -3$。

样例输入5

987654321987654321

样例输出5

98765432198765432

答案是$98765432198765432$。 确保所有的数字都匹配。

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