How does memory allocation work?

Question

Programming

Hello, how can I understand the task that the program should allocate one O (1) memory unit. They were given the task of writing a program to detect a palindrome, with this condition

Answer 1

It is allowed to allocate memory for a certain number of variables, which does not depend on the length of the string. This is a fancy way to prevent you from making a copy of the string, flipping it over and comparing it to the original.