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:
2980 - 6793 - 1879 + 5728 - 4199

Ex Output:
10123


Ex Input:
961 + 1754 - 8392 + 2659 - 495 + 358

Ex Output:
5077


Ex Input:
3287 - 342 - 6718 - 3116 - 3583 - 2398

Ex Output:

19444