human
Find the number of elements X such that X + K also exists in the array | Function to return the count of element x such that x + k also lies in this array.
Key in map will store elements and value will store the frequency of the elements.
Find if i . first + K is present in this map or not.
If we find i . first or key + K in this map then we have to increase in answer the frequency of this element.
Driver code.
array initialisation.
size of array.
initialise k"
How can the above be solved in Python?

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Write me a code to find the number of elements X such that X + K also exists in the array and the other steps required?
assistant
#Here is code to find the number of elements X such that X + K also exists in the array and the other steps required.
 def count_element ( N , K , arr ) :
	mp = dict ( )
	for i in range ( N ) :
		mp [ arr [ i ] ] = mp . get ( arr [ i ] , 0 ) + 1
	answer = 0
	for i in mp :
		if i + K in mp :
			answer += mp [ i ]
	return answer
if __name__ == ' _ _ main _ _ ' :
	arr = [ 3 , 6 , 2 , 8 , 7 , 6 , 5 , 9 ]
	N = len ( arr )
	K = 2
	print ( count_element ( N , K , arr ) )