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: 4139 - 6541 - 2616 + 299 - 700 - 6684
Example Output: 20381

Example Input: 3140 - 7915 + 2559 - 9684 + 4182 - 683 + 7754 + 763 + 4851
Example Output: 1313

Example Input: 9050 + 7188 + 3589 + 8762 + 268 + 1995 + 6080 - 4900
Example Output:
-13932