human
Maximum possible array sum after performing the given operation | Function to return the maximum possible sum after performing the given operation.
Dp vector to store the answer.
Base value.
Return the maximum sum.
Driver code"
How can the above be solved in Python?

What is a code to maximum possible array sum after performing the given operation and the other steps required?
assistant
#Here is code to maximum possible array sum after performing the given operation and the other steps required.
 def max_sum ( a , n ) :
	dp = [ [ 0 for i in range ( 2 ) ] for j in range ( n + 1 ) ]
	dp [ 0 ] [ 0 ] = 0 ; dp [ 0 ] [ 1 ] = - 999999 ;
	for i in range ( 0 , n ) :
		dp [ i + 1 ] [ 0 ] = max ( dp [ i ] [ 0 ] + a [ i ] , dp [ i ] [ 1 ] - a [ i ] ) ;
		dp [ i + 1 ] [ 1 ] = max ( dp [ i ] [ 0 ] - a [ i ] , dp [ i ] [ 1 ] + a [ i ] ) ;
	return dp [ n ] [ 0 ] ;
if __name__ == ' _ _ main _ _ ' :
	a = [ - 10 , 5 , - 4 ] ;
	n = len ( a ) ;
	print ( max_sum ( a , n ) ) ;