You are given a string, and you have to validate whether it's a valid Roman numeral. If it is valid, print True. Otherwise, print False. Try to create a regular expression for a valid Roman numeral.
Input Format
A single line of input containing a string of Roman characters.
Output Format
Output a single line containing True or False according to the instructions above.
Constraints
The number will be between and (both included).
Sample Input
CDXXI
Sample Output
True
References
Regular expressions are a key concept in any programming language. A quick explanation with Python examples is available here. You could also go through the link below to read more about regular expressions in Python.
https://developers.google.com/edu/python/regular-expressions
Solution
Source : HackerRank
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