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: 569 + 2078 + 2757 - 9211
Example Output: 4945

Example Input: 5355 + 1451 - 3895 + 6213 + 743
Example Output: 843

Example Input: 614 - 4859 + 3979 + 7091 + 9399 - 1771
Example Output:
-13225