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

Validating Credit Card Numbers

  • cc111091
     + 0 comments
    import re

def isValidCard(s):
    return bool(re.match(r"(?!.*(\d)(-?\1){3})[4-6]\d{3}(-?\d{4}){3}$", s))
        
print(*["Valid" if isValidCard(input()) else "Invalid" for _ in range(int(input()))], sep="\n")

    import re

print(*["Valid" if re.match(r"(?!.*(\d)(-?\1){3})[4-6]\d{3}(-?\d{4}){3}$", input()) else "Invalid" for _ in range(int(input()))], sep="\n")