human
Rearrange array to make sum of all subarrays starting from first index non | Function to rearrange the array such that sum of all elements of subarrays from the 1 st index is non - zero.
Initialize sum of subarrays.
Sum of all elements of array.
If sum is 0 , the required array could never be formed.
If sum is non zero , array might be formed.
Sort array in ascending order.
When current subarray sum becomes 0 replace it with the largest element.
Swap Operation.
If largest element is same as element to be replaced , then rearrangement impossible.
If b = 1 , then rearrangement is not possible . Hence check with reverse configuration.
Sort array in descending order.
When current subarray sum becomes 0 replace it with the smallest element.
Swap Operation.
If smallest element is same as element to be replaced , then rearrangement impossible.
If neither of the configurations worked then pr " - 1".
Otherwise , print the formed rearrangement.
Driver Code.
Given array.
Size of array.
Function Call"
How can the above be solved in Python?

Write me a code to rearrange array to make sum of all subarrays starting from first index non and the other steps required?
assistant
#Here is code to rearrange array to make sum of all subarrays starting from first index non and the other steps required.
 def rearrangeArray ( a , N ) :
	sum = 0
	for i in range ( N ) :
		sum += a [ i ]
	if ( sum == 0 ) :
		print ( " - 1" )
		return
	sum = 0
	b = 0
	a = sorted ( a )
	for i in range ( N ) :
		sum += a [ i ]
		if ( sum == 0 ) :
			if ( a [ i ] != a [ N - 1 ] ) :
				sum -= a [ i ]
				a [ i ] , a [ N - 1 ] = a [ N - 1 ] , a [ i ]
				sum += a [ i ]
			else :
				b = 1
				break
	if ( b == 1 ) :
		b = 0
		sum = 0
		a = sorted ( a )
		a = a [ : : - 1 ]
		for i in range ( N - 1 , - 1 , - 1 ) :
			sum += a [ i ]
			if ( sum == 0 ) :
				if ( a [ i ] != a [ 0 ] ) :
					sum -= a [ i ]
					a [ i ] , a [ 0 ] = a [ 0 ] , a [ i ]
					sum += a [ i ]
				else :
					b = 1
					break
	if ( b == 1 ) :
		print ( " - 1" )
		return
	for i in range ( N ) :
		print ( a [ i ] , end = " ▁ " )
if __name__ == ' _ _ main _ _ ' :
	arr = [ 1 , - 1 , 2 , 4 , 0 ]
	N = len ( arr )
	rearrangeArray ( arr , N )