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: 138 + 3973 - 6085 - 3324 + 6921 + 4411 + 1113 + 8310
Example Output: -15181

Example Input: 8838 + 1241 - 4918 - 8353 - 4691 - 5880
Example Output: 31439

Example Input: 1830 + 8218 + 9481
Example Output:
-15869