The awk command can make it easy to remove duplicate characters from a string even when those characters aren’t sequential, especially when the process is turned into a script. First, the awk command ...

This solution uses a hash map to store characters that have already appeared in a given string. If they are already stored in the hash map, they won't be added to the final string ans. Time complexity ...

This method deletes two consequetive element (k == 2). If there are 3 same elements ("aaa"), it will delete only two elements. Same goes for this also - "aaaaa" -> "aaa" -> "a" Here, this method doesn ...