human
Count ways to split array into two equal sum subarrays by changing sign of any one array element | Function to count ways of spliting the array in two subarrays of equal sum by changing sign of any 1 element.
Stores the count of elements in prefix and suffix of array.
Stores the total sum of array.
Traverse the array.
Increase the frequency of current element in suffix.
Stores prefix sum upto an index.
Stores sum of suffix from an index.
Stores the count of ways to split the array in 2 subarrays having equal sum.
Traverse the array.
Modify prefix sum.
Add arr [ i ] to prefix Map.
Calculate suffix sum by subtracting prefix sum from total sum of elements.
Remove arr [ i ] from suffix Map.
Store the difference between the subarrays.
Check if diff is even or not.
Count number of ways to split array at index i such that subarray sums are same.
Update the count.
Return the count.
Driver Code.
Function Call"
How can the above be solved in Python?
 ... Write me a code to count ways to split array into two equal sum subarrays by changing sign of any one array element and the other steps required?
assistant
#Here is code to count ways to split array into two equal sum subarrays by changing sign of any one array element and the other steps required.
 def countSubArraySignChange ( arr , N ) :
	prefixCount = { }
	suffixCount = { }
	total = 0
	for i in range ( N - 1 , - 1 , - 1 ) :
		total += arr [ i ]
		suffixCount [ arr [ i ] ] = suffixCount . get ( arr [ i ] , 0 ) + 1
	prefixSum = 0
	suffixSum = 0
	count = 0
	for i in range ( N - 1 ) :
		prefixSum += arr [ i ]
		prefixCount [ arr [ i ] ] = prefixCount . get ( arr [ i ] , 0 ) + 1
		suffixSum = total - prefixSum
		suffixCount [ arr [ i ] ] -= 1
		diff = prefixSum - suffixSum
		if ( diff % 2 == 0 ) :
			y , z = 0 , 0
			if - diff // 2 in suffixCount :
				y = suffixCount [ - dff // 2 ]
			if diff // 2 in prefixCount :
				z = prefixCount
			x = z + y
			count = count + x
	return count
if __name__ == ' _ _ main _ _ ' :
	arr = [ 2 , 2 , - 3 , 3 ]
	N = len ( arr )
	print ( countSubArraySignChange ( arr , N ) )