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:
4303 + 4581 + 3027 - 9269 + 3325

Ex Output:
2639


Ex Input:
9493 + 2402 - 721 + 5448 + 2919

Ex Output:
-555


Ex Input:
7627 - 406 + 3301 + 1678 + 3273 + 5383 + 5538 - 8782 + 2555

Ex Output:

-4913