human
Minimize characters to be changed to make the left and right rotation of a string same | Function to find the minimum characters to be removed from the string.
Initialize answer by N.
If length is even.
Frequency array for odd and even indices.
Store the frequency of the characters at even and odd indices.
Stores the most occuring frequency for even and odd indices.
Update the answer.
If length is odd.
Stores the frequency of the characters of the string.
Stores the most occuring characterin the string.
Update the answer.
Driver Code"
Solution in Python:

What is a code to minimize characters to be changed to make the left and right rotation of a string same and the other steps required?
assistant
#Here is code to minimize characters to be changed to make the left and right rotation of a string same and the other steps required.
 def getMinimumRemoval ( str ) :
	n = len ( str )
	ans = n
	if ( n % 2 == 0 ) :
		freqEven = { }
		freqOdd = { }
		for ch in range ( ord ( ' a ' ) , ord ( ' z ' ) + 1 ) :
			freqEven [ chr ( ch ) ] = 0
			freqOdd [ chr ( ch ) ] = 0
		for i in range ( n ) :
			if ( i % 2 == 0 ) :
				if str [ i ] in freqEven :
					freqEven [ str [ i ] ] += 1
			else :
				if str [ i ] in freqOdd :
					freqOdd [ str [ i ] ] += 1
		evenMax = 0
		oddMax = 0
		for ch in range ( ord ( ' a ' ) , ord ( ' z ' ) + 1 ) :
			evenMax = max ( evenMax , freqEven [ chr ( ch ) ] )
			oddMax = max ( oddMax , freqOdd [ chr ( ch ) ] )
		ans = ans - evenMax - oddMax
	else :
		freq = { }
		for ch in range ( ' a ' , ' z ' ) :
			freq [ chr ( ch ) ] = 0
		for i in range ( n ) :
			if str [ i ] in freq :
				freq [ str [ i ] ] += 1
		strMax = 0
		for ch in range ( ' a ' , ' z ' ) :
			strMax = max ( strMax , freq [ chr ( ch ) ] )
		ans = ans - strMax
	return ans
str = " geeksgeeks "
print ( getMinimumRemoval ( str ) )