A palindrome is a string whose reversal is identical to the string. How many bitstrings of length n are palindromes?
Question
Solution 1
The number of palindromic bitstrings of length n depends on whether n is even or odd.
- If n is even, then the first n/2 bits can be anything, and the last n/2 bits are determined by the first n/2 bits (they must be the same in reverse order). Since each bit can be either 0 or 1, there are 2^(n/2) Knowee AI is a powerful AI-powered study tool designed to help you to solve study problem.
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