To solve the problem, iterate through the string and keep track of characters already seen. Only add the first occurrence of each character to the result. This ensures all duplicates are removed, keeping the string’s order intact.

This approach is efficient and useful, just like reliable IT Support and Maintenance Australia helps businesses keep their systems clean and running smoothly without repeated issues.

Simply needed to say I truly can't stand Haskell. Took me two months to sort out some way to understand strings and work with them electric hedge trimmers..

f# solution

open System

Console.ReadLine()
|> Seq.toList
|> List.distinct
|> Seq.map string
|> String.concat ""
|> Console.WriteLine

Elixir solution:

defmodule Solution do
    def dedupe(input) do
        String.codepoints(input)
        |> Enum.reduce("", fn x, acc ->
            if String.contains?(acc, x) do
                acc
            else  
                acc <> x
            end
        end)
    end
end

input = IO.read(:stdio, :all)

Solution.dedupe(input)
|>IO.puts

how to write code in c++ in this ?