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Maximize Array sum after changing sign of any elements for exactly M times | Function to find the maximum sum with M flips.
Declare a priority queue i . e . min heap.
Declare the sum as zero.
Push all elements of the array in it.
Iterate for M times.
Get the top element.
Flip the sign of the top element.
Remove the top element.
Update the sum.
Push the temp into the queue.
Driver program.
Given input"
Solution in Python:
 ... Write me a code to maximize Array sum after changing sign of any elements for exactly M times and the other steps required?
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#Here is code to maximize Array sum after changing sign of any elements for exactly M times and the other steps required.
 def findMaximumSumWithMflips ( arr , N , M ) :
	pq = [ ]
	sum = 0
	for i in range ( N ) :
		pq . append ( arr [ i ] )
		sum += arr [ i ]
		pq . sort ( )
	while ( M > 0 ) :
		sum -= pq [ 0 ]
		temp = - 1 * pq [ 0 ]
		pq = pq [ 1 : ]
		sum += temp
		pq . append ( temp )
		pq . sort ( )
		M -= 1
	print ( sum )
if __name__ == ' _ _ main _ _ ' :
	arr = [ - 3 , 7 , - 1 , - 5 , - 3 ]
	N = len ( arr )
	M = 4
	findMaximumSumWithMflips ( arr , N , M )