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: 6844 - 1807 - 1809 + 4406 - 1450 - 5252 + 2685
Example Output: 10071

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

Example Input: 3756 - 4447 + 8568 + 8235 + 6684 - 8101 - 4670
Example Output:
-2513