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  1. Prepare
  2. Python
  3. Regex and Parsing
  4. Group(), Groups() & Groupdict()
  5. Discussions

Group(), Groups() & Groupdict()

  • finndemoncat
     + 0 comments

    Using regex

    import re
task = input()

cases = set(re.findall(r"([a-zA-Z0-9])", task))
cases = "".join(cases)

pattern = f"([{cases}])(?=\\1+)"

matches = re.search(pattern, task)

print(matches.group(1) if matches and matches.group(1) else "-1")