Roll String

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"A single roll operation increments each character by one in a circular manner within the English alphabet (a-z). For example, 'a' becomes 'b', 'b' becomes 'c', and 'z' becomes 'a'. Given a string s and an array of integers roll, perform a roll operation on the first roll[i] characters of s for each element i in the array. ### Problem The problem requires writing a function that takes a string s and an array of integers roll as input and returns the resulting string after all roll operations have been performed. ### Input - string s: the string to operate on - int roll[n]: the number of items in s to roll ### Output - string: the resulting string after all roll operations have been performed ### Constraints - Each character in s is in the range ascii[a-z]. - 1 ≤ length of s ≤ 10^5 - 1 ≤ n ≤ 10^5 - 1 ≤ roll[i] ≤ length of s, where 0 ≤ i < n."