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: 136 - 3238 + 3781 - 6552 - 4884 + 5366 - 657
Example Output: 6320

Example Input: 736 - 6527 - 3681 - 7834 + 893 + 9709 - 7544 - 3726
Example Output: 19446

Example Input: 871 - 3199 + 1352 - 4195 + 3785 - 1327
Example Output:
4455