Given a string S of length N, find the longest palindromic substring in S. Substring of string S: S[ i . . . . j ] where 0 ≤ i ≤ j < len(S). Palindrome string: A string which reads the same backwards.

12th Fret Rule: The 12th fret is always exactly halfway between the nut and the saddle — equal to half the scale length. This is the foundation of all fret position calculations. The vibrating string ...

# Check if characters of the given string can be rearranged to form a palindrome. # Counter is faster for long strings and non-Counter is faster for short strings.