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  1. Prepare
  2. Python
  3. Regex and Parsing
  4. Validating Credit Card Numbers
  5. Discussions

Validating Credit Card Numbers

  • NYJ1qCr
     + 12 comments

    My Solution：

    import re


for _ in range(int(input())):
    s = input()

    if re.match(r"^[456]([\d]{15}|[\d]{3}(-[\d]{4}){3})$", s) and not re.search(r"([\d])\1\1\1", s.replace("-", "")):
        print("Valid")
    else:
        print("Invalid")