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:
4054 + 5873 - 3926 - 2524 + 5551 - 1721

Ex Output:
801


Ex Input:
8294 + 6661 + 4555 + 6171

Ex Output:
-9093


Ex Input:
7702 + 6785 + 7363 + 5833

Ex Output:

-12279