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: 1815 - 3167 - 773
Example Output: 5755

Example Input: 8625 - 7177 + 4191
Example Output: 11611

Example Input: 3419 + 1526 + 8937 + 2231 + 6172 + 2261 - 5552
Example Output:
-12156