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: 573 - 2172 + 3067 + 6526 - 4690
Example Output: -2158

Example Input: 5610 - 3034 + 9312 + 7337 + 2731 + 8581 + 5926 - 2102 + 2137
Example Output: -25278

Example Input: 2705 - 9364 - 6850 - 4579 - 4494 - 4688 - 1455 - 8685
Example Output:
42820