human
Check if rearranging Array elements can form a Palindrome or not | Function to check whether elements of an array can form a palindrome.
create an empty string to append elements of an array.
append each element to the string str to form a string so that we can solve it in easy way.
Create a freq array and initialize all values as 0.
For each character in formed string , increment freq in the corresponding freq array.
Count odd occurring characters.
Return true if odd count is 0 or 1 ,.
Driver Code"
How can the above be solved in Python?
assistant
#Here is code to check if rearranging Array elements can form a Palindrome or not and the other steps required.
 def can_form_palindrome ( arr , n ) :
	MAX = 256
	s = " "
	for i in range ( n ) :
		s = s + str ( arr [ i ] )
	freq = [ 0 ] * MAX
	for i in range ( N ) :
		freq [ arr [ i ] ] = freq [ arr [ i ] ] + 1
	count = 0
	for i in range ( MAX ) :
		if ( freq [ i ] & 1 ) :
			count = count + 1
		if ( count > 1 ) :
			return False
	return True
if __name__ == " _ _ main _ _ " :
	arr = [ 1 , 2 , 3 , 1 , 2 ]
	N = len ( arr )
	if ( can_form_palindrome ( arr , N ) ) :
		print ( " YES " )
	else :
		print ( " NO " )