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:
6042 + 4328 - 5171 + 23 + 4485 + 8072 + 4298

Ex Output:
-9993


Ex Input:
875 + 1299 - 1721 - 4432 - 7136 - 2468

Ex Output:
15333


Ex Input:
3971 - 5555 - 366 + 8775 - 2736

Ex Output:

3853