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:
5175 - 1386 - 5328 - 898 + 5361 - 376 + 1286 + 861

Ex Output:
5655


Ex Input:
6946 + 6834 - 1169 + 9756 + 2063 - 4750 - 425 + 1121 + 8155

Ex Output:
-14639


Ex Input:
4874 - 7434 + 9492 + 1983 + 7346

Ex Output:

-6513