human
Remove a character from a string to make it a palindrome | Utility method to check if substring from low to high is palindrome or not ..
This method returns - 1 if it is not possible to make string a palindrome . It returns - 2 if string is already a palindrome . Otherwise it returns index of character whose removal can make the whole string palindrome ..
Initialize low and right by both the ends of the string.
loop until low and high cross each other.
If both characters are equal then move both pointer towards end.
If removing str [ low ] makes the whole string palindrome . We basically check if substring str [ low + 1. . high ] is palindrome or not ..
If removing str [ high ] makes the whole string palindrome We basically check if substring str [ low + 1. . high ] is palindrome or not.
We reach here when complete string will be palindrome if complete string is palindrome then return mid character.
Driver Code"
Solution in Python:
assistant
#Here is code to remove a character from a string to make it a palindrome and the other steps required.
 def isPalindrome ( string : str , low : int , high : int ) -> bool :
	while low < high :
		if string [ low ] != string [ high ] :
			return False
		low += 1
		high -= 1
	return True
def possiblepalinByRemovingOneChar ( string : str ) -> int :
	low = 0
	high = len ( string ) - 1
	while low < high :
		if string [ low ] == string [ high ] :
			low += 1
			high -= 1
		else :
			if isPalindrome ( string , low + 1 , high ) :
				return low
			if isPalindrome ( string , low , high - 1 ) :
				return high
			return - 1
	return - 2
if __name__ == " _ _ main _ _ " :
	string = " abecbea "
	idx = possiblepalinByRemovingOneChar ( string )
	if idx == - 1 :
		print ( " Not ▁ possible " )
	elif idx == - 2 :
		print ( " Possible ▁ without ▁ removing ▁ any ▁ character " )
	else :
		print ( " Possible ▁ by ▁ removing ▁ character ▁ at ▁ index " , idx )