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:
9964 + 5009 - 6772 + 8761 + 2075 + 6292 + 4157 + 5194

Ex Output:
-14752


Ex Input:
2219 - 6451 + 1224 + 2776 + 8750 - 8397 - 5833 - 9401 - 554

Ex Output:
20105


Ex Input:
6578 - 9290 - 6787 + 1330 - 5432

Ex Output:

26757