No.1642 Registration
Problem Statement
You have come to take an exam.
Now that the exam has started, you have decided to first write your examinee number on the answer sheet.
However, if the examinee number has $1$ digit, you must write $2$ leading $0$s, and if it has $2$ digits, you must write $1$ leading $0$.
Given your examinee number $N$, print the string you should write on the answer sheet.
It is guaranteed that $N$ is a positive integer with at most $3$ digits.
Input
$N$
- $1 \leq N \leq 999$
- $N$ is an integer.
Output
Print the string you should write on the answer sheet, followed by a newline.
Sample
Sample 1
Input
15
Output
015
Since $N$ has $2$ digits, you must write $1$ leading $0$.
Sample 2
Input
777
Output
777
This examinee number looks likely to bring a passing result.
Sample 3
Input
1
Output
001
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