Validating Credit Card Numbers in Python HackerRank Solution
Validating Credit Card Numbers in Python HackerRank Solution
Problem :
You and Fredrick are good friends. Yesterday, Fredrick received N credit cards
from ABCD Bank. He wants to verify whether his credit card numbers are valid
or not. You happen to be great at regex so he is asking for your help!
A valid credit card from ABCD Bank has the following
characteristics:
► It must start with a 4, 5 or 6.
► It must contain exactly 16 digits.
► It must only consist of digits (0-9).
► It may have digits in groups of 4, separated by one hyphen "-".
► It must NOT use any other separator like ' ' , '_', etc.
► It must NOT have 4 or more consecutive repeated digits.
► It must contain exactly 16 digits.
► It must only consist of digits (0-9).
► It may have digits in groups of 4, separated by one hyphen "-".
► It must NOT use any other separator like ' ' , '_', etc.
► It must NOT have 4 or more consecutive repeated digits.
Example :
Valid Credit Card Numbers
4253625879615786 4424424424442444 5122-2368-7954-3214
Invalid Credit Card Numbers
42536258796157867 #17 digits in card number → Invalid 4424444424442444 #Consecutive digits are repeating 4 or more times → Invalid 5122-2368-7954 - 3214 #Separators other than '-' are used → Invalid 44244x4424442444 #Contains non digit characters → Invalid 0525362587961578 #Doesn't start with 4, 5 or 6 → Invalid
Input Format :
The first line of input contains an integer N.
The next N lines contain credit card numbers
The next N lines contain credit card numbers
Constraints :
- 0 < N < 100
Output Format :
Print 'Valid' if the credit card number is valid. Otherwise, print 'Invalid'.
Do not print the quotes.
Sample Input :
6 4123456789123456 5123-4567-8912-3456 61234-567-8912-3456 4123356789123456 5133-3367-8912-3456 5123 - 3567 - 8912 - 3456
Sample Output :
Valid Valid Invalid Valid Invalid Invalid
Explanation :
4123456789123456 : Valid
5123-4567-8912-3456 : Valid
61234-576-8912-3456 : Invalid, because the card number is not divided into equal groups of 4.
4123356789123456 : Valid
5133-3367-8912-3456 : Invalid, consecutive digits 3333 is repeating 4 times.
5123 - 4567 - 8912 - 3456 : Invalid, because space ' ' and
5123-4567-8912-3456 : Valid
61234-576-8912-3456 : Invalid, because the card number is not divided into equal groups of 4.
4123356789123456 : Valid
5133-3367-8912-3456 : Invalid, consecutive digits 3333 is repeating 4 times.
5123 - 4567 - 8912 - 3456 : Invalid, because space ' ' and
- are used as separators.
Solution :
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 | # Validating Credit Card Numbers in Python Hacker Rank Solution # Python 3 # Enter your code here. Read input from STDIN. Print output to STDOUT # Validating Credit Card Numbers in Python Hacker Rank Solution START import re for i in range(int(input())): S = input().strip() pre_match = re.search(r'^[456]\d{3}(-?)\d{4}\1\d{4}\1\d{4}$',S) if pre_match: processed_string = "".join(pre_match.group(0).split('-')) final_match = re.search(r'(\d)\1{3,}',processed_string) if final_match: print('Invalid') else : print('Valid') else: print('Invalid') # Validating Credit Card Numbers in Python Hacker Rank Solution END |
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