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: 1860 - 6675 + 8615 + 485 + 6302 - 3385 + 1568
Example Output: -5050

Example Input: 1815 - 3167 - 773
Example Output: 5755

Example Input: 709 - 1100 + 3233 - 6982
Example Output:
5558