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: 9001 + 6216 - 1478 + 5475 - 8693 - 3911 - 319 + 4768 - 320
Example Output: 7263

Example Input: 1078 + 2128 + 513 + 5898 - 8020
Example Output: 559

Example Input: 1501 + 459 + 4034
Example Output:
-2992