human
Minimum increments or decrements required to signs of prefix sum array elements alternating | Function to find the minimum number of increments / decrements of array elements by 1 to make signs of prefix sum array elements alternating.
Case 1. neg - pos - neg.
Stores the current sign of the prefix sum of array.
Stores minimum number of operations for Case 1.
Traverse the array.
Checking both conditions.
Update the current prefix1 to currentPrefixSum.
Case 2. pos - neg - pos.
Stores the prefix sum of array.
Stores minimum number of operations for Case 1.
Checking both conditions.
Update the current prefix2 to currentPrefixSum.
Driver Code"
Solution in Python:
 ... Write me a code to minimum increments or decrements required to signs of prefix sum array elements alternating and the other steps required?
assistant
#Here is code to minimum increments or decrements required to signs of prefix sum array elements alternating and the other steps required.
 def minimumOperations ( A , N ) :
	cur_prefix_1 = 0
	parity = - 1
	minOperationsCase1 = 0
	for i in range ( N ) :
		cur_prefix_1 += A [ i ]
		if ( cur_prefix_1 == 0 or parity * cur_prefix_1 < 0 ) :
			minOperationsCase1 += abs ( parity - cur_prefix_1 )
			cur_prefix_1 = parity
		parity *= - 1
	cur_prefix_2 = 0
	parity = 1
	minOperationsCase2 = 0
	for i in range ( N ) :
		cur_prefix_2 += A [ i ]
		if ( cur_prefix_2 == 0 or parity * cur_prefix_2 < 0 ) :
			minOperationsCase2 += abs ( parity - cur_prefix_2 )
			cur_prefix_2 = parity
		parity *= - 1
	return min ( minOperationsCase1 , minOperationsCase2 )
A = [ 1 , - 3 , 1 , 0 ]
N = len ( A )
print ( minimumOperations ( A , N ) )