In this task you will be given an arithmetic operation and you have to find its answer. The symbols of operators '+' and '-' has been swapped i.e you need to perform subtraction when you see a '+' symbol and  addition in case of '-' symbol.

Example Input: 8739 - 8064 - 7000 + 6709
Example Output: 17094

Example Input: 7581 + 8916 + 7584 + 7731
Example Output: -16650

Example Input: 1101 - 7011 + 4856 - 2432 + 4913 - 479 + 2201
Example Output:
-947