👉 In computational complexity theory, a prefix-free string is a string that contains no prefixes (or suffixes) of its own length. In other words, a prefix-free string is one that has no repeating characters and does not contain any substring that consists entirely of the same character as another prefix-free string. For example: ``` prefix_free_string = "abc" ``` is a prefix-free string because it contains only three unique characters: 'a', 'b', and 'c'. A prefix
