Score : $100$ points

问题描述

你将得到一个整数 $N$，其取值范围在 $0$ 到 $9999$（包含两端点）之间。

你需要在该整数前面添加必要的零，并将其打印为一个四位数的字符串。

以上为通义千问 qwen-max 翻译，仅供参考。

Problem Statement

You are given an integer $N$ between $0$ and $9999$ (inclusive).

Print it as a four-digit string after appending to it the necessary number of leading zeros.

Constraints

• $0 \leq N \leq 9999$
• $N$ is an integer.

Input

Input is given from Standard Input in the following format:

$N$

Output

Print the answer.

Sample Input 1

321

Sample Output 1

0321

$321$ has three digits, so we need to add one leading zero to it to make it have four digits.

Sample Input 2

7777

Sample Output 2

7777

Sample Input 3

1

Sample Output 3

0001

update @ 2024/3/10 09:46:11