3271. Hash Divided String

You are given a string s of length n and an integer k, where n is a multiple of k. Your task is to hash the string s into a new string called result, which has a length of n / k. First, divide s into n / k substrings, each with a length of k. Then, initialize result as an empty string. For each substring in order from the beginning: - The hash value of a character is the index of that character