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: 519 - 9471 - 7173 - 34 - 5123 + 9104 - 2340 + 7208 - 3693
Example Output: 12041

Example Input: 4483 + 3021 - 5582 - 3918 + 8842
Example Output: 2120

Example Input: 2283 + 104 - 3185 + 5691
Example Output:
-327