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:
7388 - 3073 - 1891 + 2180 + 1361 - 9381 + 566 - 2665

Ex Output:
20291


Ex Input:
2514 - 3539 - 8491 + 7351 - 1448

Ex Output:
8641


Ex Input:
9756 - 1795 - 1435 + 2331 + 392

Ex Output:

10263