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

Validating Credit Card Numbers

  • daltona2133
     + 0 comments
    validation = r'^(?=[456])(?!.*(\d)(-?\1){3})\d{4}(-?\d{4}){3}$'
for _ in range(int(input())):
    if re.match(validation, input()):
        print("Valid")
    else:
        print("Invalid")