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:
8769 - 3041 - 6567 + 1136 + 3380 + 4191 + 2049 + 7794 - 4291

Ex Output:
4118


Ex Input:
5299 - 8968 + 5239 + 1119

Ex Output:
7909


Ex Input:
9315 - 2492 + 1235 - 2290

Ex Output:

12862