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:
9488 + 7771 + 5889 + 9584 + 3302 - 1602 + 5806 - 8895 - 8030

Ex Output:
-4337


Ex Input:
7646 + 8509 - 4372 - 9840 - 6377 - 2924 + 869

Ex Output:
21781


Ex Input:
7494 + 3887 + 4616 - 8771

Ex Output:

7762