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:
7165 + 3630 + 9021 - 4140 + 319

Ex Output:
-1665


Ex Input:
8602 - 1293 - 8063 - 4529 + 453 - 6407

Ex Output:
28441


Ex Input:
4725 - 7780 + 1028 - 6858 + 9194 + 4680 - 3421 + 362 - 8573

Ex Output:

16093