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: 7581 + 8916 + 7584 + 7731
Example Output: -16650

Example Input: 2673 - 123 - 5121 + 7601 + 976 + 4369 - 4232
Example Output: -797

Example Input: 204 - 9820 - 9583 + 9452 + 730 - 5257 + 9349 - 4862
Example Output:
10195