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  1. Prepare
  2. Python
  3. Regex and Parsing
  4. Validating Roman Numerals
  5. Discussions

Validating Roman Numerals

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204 Discussions

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  • jakubszrajber12
     + 0 comments
    regex_pattern = r"^M{,3}(CM|CD|D?C{,3})(XL|L?X{,3}|XC)(I{,3}|IV|V?I{,3}|IX)$"

import re
print(str(bool(re.match(regex_pattern, input()))))

  • yashdeora98294
     + 0 comments

    Here is HackerRank Validating Roman Numerals in Python solution - https://programmingoneonone.com/hackerrank-validating-roman-numerals-solution-in-python.html

  • ifdef42
     + 0 comments

    Interesting problem, and I learned a fine point or two about Roman numerals. :)

    My solution is a little different in that I didn't use any | alternatives:

    regex_pattern = r"^M{0,3}(CM)?(C?D)?C{0,3}(XC)?(X?L)?X{0,3}(IX)?(I?V)?I{0,3}$"

  • parthkejriwal18
     + 0 comments

    regex_pattern = r"^(M{0,3})(C{0,3}|CD|D|DC|DCC|DCCC|CM)(X{0,3}|XL|L|LX|LXX|LXXX|XC)(I{0,3}|IV|V|VI|VII|VIII|IX)$"

    import re print(str(bool(re.match(regex_pattern, input()))))

  • parthkejriwal18
     + 0 comments

    regex_pattern = r"^(M{0,3})(C{0,3}|CD|D|DC|DCC|DCCC|CM)(X{0,3}|XL|L|LX|LXX|LXXX|XC)(I{0,3}|IV|V|VI|VII|VIII|IX)$"

    import re print(str(bool(re.match(regex_pattern, input()))))