human
Maximum sum of Bitwise XOR of all elements of two equal length subsets | Function that finds the maximum Bitwise XOR sum of the two subset.
Check if the current state is already computed.
Initialize answer to minimum value.
Iterate through all possible pairs.
Check whether ith bit and jth bit of mask is not set then pick the pair.
For all possible pairs find maximum value pick current a [ i ] , a [ j ] and set i , j th bits in mask.
Store the maximum value and return the answer.
Driver Code.
Given array arr [ ].
Declare Initialize the dp states.
Function call"
How can the above be solved in Python?
assistant
#Here is code to maximum sum of Bitwise XOR of all elements of two equal length subsets and the other steps required.
 def xorSum ( a , n , mask , dp ) :
	if ( dp [ mask ] != - 1 ) :
		return dp [ mask ]
	max_value = 0
	for i in range ( n ) :
		for j in range ( i + 1 , n ) :
			if ( i != j and ( mask & ( 1 << i ) ) == 0 and ( mask & ( 1 << j ) ) == 0 ) :
				max_value = max ( max_value , ( a [ i ] ^ a [ j ] ) + xorSum ( a , n , ( mask | ( 1 << i ) | ( 1 << j ) ) , dp ) )
	dp [ mask ] = max_value
	return dp [ mask ]
n = 4
arr = [ 1 , 2 , 3 , 4 ]
dp = [ - 1 ] * ( ( 1 << n ) + 5 )
print ( xorSum ( arr , n , 0 , dp ) )