human
Find largest d in array such that a + b + c = d | The function finds four elements with given sum X.
Store sums ( a + b ) of all pairs ( a , b ) in a hash table.
Traverse through all pairs and find ( d - c ) is present in hash table.
If d - c is present in hash table ,.
Making sure that all elements are distinct array elements and an element is not considered more than once ..
Driver Code"
Solution in Python:
 ... What is a code to find largest d in array such that a + b + c = d and the other steps required?
assistant
#Here is code to find largest d in array such that a + b + c = d and the other steps required.
 def findFourElements ( arr , n ) :
	mp = dict ( )
	for i in range ( n - 1 ) :
		for j in range ( i + 1 , n ) :
			mp [ arr [ i ] + arr [ j ] ] = ( i , j )
	d = - 10 ** 9
	for i in range ( n - 1 ) :
		for j in range ( i + 1 , n ) :
			abs_diff = abs ( arr [ i ] - arr [ j ] )
			if abs_diff in mp . keys ( ) :
				p = mp [ abs_diff ]
				if ( p [ 0 ] != i and p [ 0 ] != j and p [ 1 ] != i and p [ 1 ] != j ) :
					d = max ( d , max ( arr [ i ] , arr [ j ] ) )
	return d
arr = [ 2 , 3 , 5 , 7 , 12 ]
n = len ( arr )
res = findFourElements ( arr , n )
if ( res == - 10 ** 9 ) :
	print ( " No ▁ Solution . " )
else :
	print ( res )