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:
2432 + 588 - 6240 + 8670

Ex Output:
-586


Ex Input:
6881 + 1331 - 470 + 6067 - 9323

Ex Output:
9276


Ex Input:
2433 - 3251 - 3306 + 1917 - 7642 + 9634 - 3088 + 8422

Ex Output:

-253