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

Example Input: 8354 + 2602 + 1315
Example Output: 4437

Example Input: 9435 + 7137 + 9782 - 2476 - 3257 + 6964 + 9165 - 2736 + 4702
Example Output:
-19846