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: 5708 + 4556 - 3280 - 4490 + 6094 - 4041
Example Output: 6869

Example Input: 1701 + 3893 - 695 + 2870 + 5011
Example Output: -9378

Example Input: 3648 + 8353 - 763 + 2637
Example Output:
-6579