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:
5125 - 607 + 8597 + 4804 + 5962 - 7812 - 176 - 9436 + 6198

Ex Output:
-2405


Ex Input:
7427 + 8795 - 4104 + 7720 - 6667

Ex Output:
1683


Ex Input:
7385 + 810 - 3224 - 9574

Ex Output:

19373