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:
4495 + 1180 - 7554 - 4842

Ex Output:
15711


Ex Input:
2588 + 7474 + 7336 + 2767 - 1155 - 3435 - 6693

Ex Output:
-3706


Ex Input:
2119 + 8050 - 3262 + 23 + 3072 - 3073 + 9507 - 3597

Ex Output:

-8601