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:
5409 - 5550 + 3864 - 5911 + 5222

Ex Output:
7784


Ex Input:
2348 - 6075 + 2149 - 1926 - 9532 - 9774 + 2760 - 6500 + 8335

Ex Output:
22911


Ex Input:
5794 + 8851 + 4881

Ex Output:

-7938