human
Give me a code to count quadruples from four sorted arrays whose sum is equal to a given value x and the other steps required given the following:
Count quadruples from four sorted arrays whose sum is equal to a given value x | function to count all quadruples from four sorted arrays whose sum is equal to a given value x.
unordered_map ' um ' implemented as hash table for < sum , frequency > tuples.
count frequency of each sum obtained from the pairs of arr1 [ ] and arr2 [ ] and store them in 'um  .
generate pair from arr3 [ ] and arr4 [ ].
calculate the sum of elements in the pair so generated.
if ' x - p _ sum ' is present in ' um ' then add frequency of ' x - p _ sum ' to ' count '.
required count of quadruples.
four sorted arrays each of size n"
Solution in Python:
assistant
#Here is code to count quadruples from four sorted arrays whose sum is equal to a given value x and the other steps required.
 def countQuadruples ( arr1 , arr2 , arr3 , arr4 , n , x ) :
	count = 0
	m = { }
	for i in range ( n ) :
		for j in range ( n ) :
			if ( arr1 [ i ] + arr2 [ j ] ) in m :
				m [ arr1 [ i ] + arr2 [ j ] ] += 1
			else :
				m [ arr1 [ i ] + arr2 [ j ] ] = 1
	for k in range ( n ) :
		for l in range ( n ) :
			p_sum = arr3 [ k ] + arr4 [ l ]
			if ( x - p_sum ) in m :
				count += m [ x - p_sum ]
	return count
arr1 = [ 1 , 4 , 5 , 6 ]
arr2 = [ 2 , 3 , 7 , 8 ]
arr3 = [ 1 , 4 , 6 , 10 ]
arr4 = [ 2 , 4 , 7 , 8 ]
n = len ( arr1 )
x = 30
print ( " Count ▁ = " , countQuadruples ( arr1 , arr2 , arr3 , arr4 , n , x ) )