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: 3186 + 271 - 7916
Example Output: 10831

Example Input: 5355 + 1451 - 3895 + 6213 + 743
Example Output: 843

Example Input: 706 + 3486 + 8385 + 915
Example Output:
-12080