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: 1011 - 5404 + 4286 - 549 - 4178 - 1559
Example Output: 8415

Example Input: 9806 + 7051 + 6703 + 4233 - 276
Example Output: -7905

Example Input: 7449 + 5510 - 2733 - 760 + 1168 - 140 + 967
Example Output:
3437