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.

Ex Input:
3089 - 6778 - 3604 - 1052 - 1332

Ex Output:
15855


Ex Input:
9713 + 8053 - 1782 + 6126 + 5918 + 968 - 2071 - 879 + 558

Ex Output:
-7178


Ex Input:
4189 + 206 + 2749 - 264 + 517 - 1780 + 4727 + 4951

Ex Output:

-6917