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: 8354 + 2602 + 1315
Example Output: 4437

Example Input: 136 + 9772 - 2848 - 4980 + 6156 - 883 + 5407 + 3211
Example Output: -15699

Example Input: 7789 - 3799 + 3681 - 1007 - 8592 + 6598 - 6386 + 9564 + 6549
Example Output:
1181