human
Find the last positive element remaining after repeated subtractions of smallest positive element from all Array elements | Function to calculate last positive element of the array.
Return the first element if N = 1.
Stores the greatest and the second greatest element.
Traverse the array A [ ].
If current element is greater than the greatest element.
If current element is greater than second greatest element.
Return the final answer.
Driver Code"
How can the above be solved in Python?

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Can you provide a code to find the last positive element remaining after repeated subtractions of smallest positive element from all Array elements and the other steps required?
assistant
#Here is code to find the last positive element remaining after repeated subtractions of smallest positive element from all Array elements and the other steps required.
 def lastPositiveElement ( arr ) :
	N = len ( arr ) ;
	if ( N == 1 ) :
		return arr [ 0 ] ;
	greatest = - 1 ; secondGreatest = - 1 ;
	for x in arr :
		if ( x >= greatest ) :
			secondGreatest = greatest ;
			greatest = x ;
		elif ( x >= secondGreatest ) :
			secondGreatest = x ;
	return greatest - secondGreatest ;
if __name__ == " _ _ main _ _ " :
	arr = [ 3 , 5 , 4 , 7 ] ;
	print ( lastPositiveElement ( arr ) ) ;