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: 4854 - 2012 + 5206 - 7285 - 579
Example Output: 9524

Example Input: 3394 - 2316 - 9713
Example Output: 15423

Example Input: 4445 - 8997 - 5449 - 9309
Example Output:
28200