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:
136 - 3238 + 3781 - 6552 - 4884 + 5366 - 657

Ex Output:
6320


Ex Input:
1971 - 5591 + 4038 + 5571

Ex Output:
-2047


Ex Input:
8371 - 6591 + 290 - 8140 - 5493 + 8205 - 6179 + 7497 + 1686

Ex Output:

17096