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:
7208 + 2074 + 2796 - 8783

Ex Output:
11121


Ex Input:
5161 + 8791 + 9352 + 7272 + 935 + 8632 + 1201

Ex Output:
-31022


Ex Input:
7920 - 9746 + 5044 - 1631 - 3413 + 8228

Ex Output:

9438