human
Can you provide a code to longest substring whose characters can be rearranged to form a Palindrome and the other steps required given the following:
Longest substring whose characters can be rearranged to form a Palindrome | Function to get the length of longest substring whose characters can be arranged to form a palindromic string.
To keep track of the last index of each xor.
Initialize answer with 0.
Now iterate through each character of the string.
Convert the character from [ a , z ] to [ 0 , 25 ].
Turn the temp - th bit on if character occurs odd number of times and turn off the temp - th bit off if the character occurs ever number of times.
If a mask is present in the index Therefore a palindrome is found from index [ mask ] to i.
If x is not found then add its position in the index dict ..
Check for the palindrome of odd length.
We cancel the occurrence of a character if it occurs odd number times.
Given String.
Length of given string.
Function call"
How can the above be solved in Python?
assistant
#Here is code to longest substring whose characters can be rearranged to form a Palindrome and the other steps required.
 def longestSubstring ( s : str , n : int ) :
	index = dict ( )
	answer = 0
	mask = 0
	index [ mask ] = - 1
	for i in range ( n ) :
		temp = ord ( s [ i ] ) - 97
		mask ^= ( 1 << temp )
		if mask in index . keys ( ) :
			answer = max ( answer , i - index [ mask ] )
		else :
			index [ mask ] = i
		for j in range ( 26 ) :
			mask2 = mask ^ ( 1 << j )
			if mask2 in index . keys ( ) :
				answer = max ( answer , i - index [ mask2 ] )
	return answer
s = " adbabd "
n = len ( s )
print ( longestSubstring ( s , n ) )