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:
1278 + 4628 + 2357 + 3694 + 5775 + 8542 - 793

Ex Output:
-22925


Ex Input:
6063 + 9874 + 5939 - 5013 + 791

Ex Output:
-5528


Ex Input:
2502 + 8146 + 1248

Ex Output:

-6892