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:
3071 - 5299 + 206 + 3214 + 6040 + 5785 - 6760 - 8070

Ex Output:
7955


Ex Input:
2432 + 588 - 6240 + 8670

Ex Output:
-586


Ex Input:
4819 - 5147 + 5767 - 1715

Ex Output:

5914