← 返回 stripe 的题目列表Credit Card Parsing
类型：online_judge
stripe
Credit Card Parsing
Implement a function that takes a string input of a credit card number and returns the parsing result, including the card type (such as Visa, MasterCard, etc.) and whether it is valid. Card number validity can be checked using the Luhn algorithm. Card type can be determined by the first few digits, according to the following rules:
Visa: Starts with 4, and the card number length is 13, 16, or 19.
MasterCard: Starts with numbers from 51 to 55, and the card number length is 16.
Input
A string representing the credit card number.
Output
A dictionary containing the card type and validity.
Example
Example 1:
Input: "4242424242424242"
Output: {"type": "Visa", "valid": true}
Example 2:
Input: "5105105105105100"
Output: {"type": "MasterCard", "valid": true}
Example 3:
Input: "1234567890123456"
Output: {"type": "Unknown", "valid": false}
Constraints
The input card number contains only digit characters, with a length between 13 and 19.
Example
Input
4242424242424242