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: 9485 + 6349 - 1527 - 4730 - 5865 + 851 - 7415 - 3548 + 2868
Example Output: 22502

Example Input: 6108 + 2133 + 8600
Example Output: -4625

Example Input: 13 - 9358 + 7733
Example Output:
1638