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: 1259 - 2367 + 9919 + 7196 + 4121
Example Output: -17610

Example Input: 3915 + 4904 + 4887 + 7162 - 3798 + 233 + 1101 - 7758 - 4627
Example Output: 1811

Example Input: 5487 + 9269 + 7286 + 1616
Example Output:
-12684