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: 8213 - 7166 - 3524 + 2770 + 767 - 3629 - 7894
Example Output: 26889

Example Input: 1011 - 5404 + 4286 - 549 - 4178 - 1559
Example Output: 8415

Example Input: 3463 - 7746 - 8373 - 6146 + 1894
Example Output:
23834