Unique Characters

Problem: Unique Characters You are given an ASCII string s, which can include spaces or punctuation marks. Determine the earliest character whose total frequency in the string is one. Unique character: any character occurring one time only in the entire string. Return: The zero-based position of the leftmost unique character in s. Return -1 when every character occurs more than once. Input A single line that contains the string s. Output Print one integer: the zero-based…