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:
9001 + 6216 - 1478 + 5475 - 8693 - 3911 - 319 + 4768 - 320

Ex Output:
7263


Ex Input:
3631 - 7822 - 8283 + 4667 - 697

Ex Output:
15766


Ex Input:
3223 + 7408 - 9605

Ex Output:

5420