#Strings

Answer another DSA question focusing on strings.

Complete a coding question that focuses on string manipulation.

Given a string, find the length of the longest substring that contains all unique characters. Explain your approach and provide a solution with its time complexity.

In a stream of characters, determine which character has the kth highest frequency. If two characters have the same frequency, return the one that appears first in the stream. Example: If the input is 'abracadabra', k = 2, the output should be 'a'.

Given a string, find all the anagrams that can be formed using the characters of that string. Return a list of all grouped anagrams sorted in a specific order.