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: 3238 + 2914 + 4122
Example Output: -3798

Example Input: 4899 - 3034 + 3351 + 7952 + 4527 - 2700 - 3143 + 3642 - 2445
Example Output:
-3251