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:
240 - 438 + 497 - 5901 - 1960 + 4782 + 6400 - 4055

Ex Output:
915


Ex Input:
6844 + 1340 - 4174 - 5664 + 4911 - 5241

Ex Output:
15672


Ex Input:
2920 - 2582 + 2018 - 5202 + 3726 - 2417

Ex Output:

7377