human
Find four elements a , b , c and d in an array such that a + b = c + d | function to find a , b , c , d such that ( a + b ) = ( c + d ).
Create an empty hashmap to store mapping from sum to pair indexes.
Traverse through all possible pairs of arr [ ].
Sum already present in hash.
driver program"
Solution in Python:
assistant
#Here is code to find four elements a , b , c and d in an array such that a + b = c + d and the other steps required.
 def find_pair_of_sum ( arr : list , n : int ) :
	map = { }
	for i in range ( n ) :
		for j in range ( i + 1 , n ) :
			sum = arr [ i ] + arr [ j ]
			if sum in map :
				print ( f " { map [ sum ] } ▁ and ▁ ( { arr [ i ] } , ▁ { arr [ j ] } ) " )
				return
			else :
				map [ sum ] = ( arr [ i ] , arr [ j ] )
if __name__ == " _ _ main _ _ " :
	arr = [ 3 , 4 , 7 , 1 , 2 , 9 , 8 ]
	n = len ( arr )
	find_pair_of_sum ( arr , n )