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: 8155 + 6800 - 6839 - 8047 + 3270
Example Output: 12971

Example Input: 1320 + 3923 - 1080 - 3521 - 8998 + 4479 - 2559 - 7680
Example Output: 16756

Example Input: 5437 - 3814 + 5006 + 9874 - 1224 + 5679 + 780 - 8668
Example Output:
-2196