Minimum Bill

You Freind is buying some items from a grocery store and now it’s time to pay the bill. The bill is represented in the form of an integer array 'A' consisting of 'N' integers. The integers in array 'A' denote the cost of items you purchased. he gets a chance to make a change in the bill. In one change, he can select any index 'i' in array 'A' and multiply element 'A[i]' by -1. Your task is to pe