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:
84 - 4898 - 2883 + 5111 - 7812 - 5830 + 3330 + 8500 + 6754

Ex Output:
-2188


Ex Input:
1971 - 5591 + 4038 + 5571

Ex Output:
-2047


Ex Input:
8787 + 8353 - 4192 - 7477

Ex Output:

12103