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:
6820 - 387 + 8290 - 9203 - 9292 + 9249 - 3079

Ex Output:
11242


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

Ex Output:
-14752


Ex Input:
5414 + 4107 + 8015 + 7231

Ex Output:

-13939