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:
4266 - 8914 - 9115 - 7595 - 3820 + 191 + 3199 - 4910

Ex Output:
35230


Ex Input:
7025 + 6005 + 6548 - 4628

Ex Output:
-900


Ex Input:
6715 - 8877 + 8138 + 5904 - 4198

Ex Output:

5748