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URL Hashing 🐩

🤘 INTERN

Implement an algorithm to hash a URL as described.

Suppose the given URL url of length n is to be hashed with a string hash_string of length m. Given an integer k, run the url through the following algorithm:

Divide the URL into blocks of size k starting from the left. The last block can be smaller than k. For example, if url = "https://xyz.com" and k = 4, the blocks are ["http", "s://", "xyz.", "com"].

The values of the English characters 'a', 'b', ..., 'z' are 0, 1, ..., 25 respectively, and that of ':', '/' and '.' are 26, 27, and 28 respectively. Thus the has value of the block "s://" will be 19 + 26 + 27 + 27 = 98.

For each URL, find the hash value of each block. The hash value is the sum of the values of each character.

Replace the block with the (hash value of the block modulo m)th character of the string hash_string.

Given the string url, hash_string, and an integer k, find the hashed string.

Example 1:

Input:  url = "https://xyz.com", hashString = "pqrst", k = 4
Output: "psps" 
Explanation:


Each hash value is divided by the len of hash_strong or 5 in this case. The remainders oint to the characters in hash_string, and the answer is "psps".

Constraints:

Unknwo for now 🐼