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:
7266 - 5601 + 6292 - 3129 - 4781 - 6736 - 1566 - 7004

Ex Output:
29791


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

Ex Output:
-14752


Ex Input:
5042 + 4587 - 7466

Ex Output:

7921