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:
3123 + 9519 - 2864 + 9440 - 756 + 252

Ex Output:
-12468


Ex Input:
3254 - 200 + 4450 - 6393 - 2480 + 4564 + 9650

Ex Output:
-6337


Ex Input:
9747 - 8566 - 174 + 2842 - 7863 - 8206 - 6077 + 1604

Ex Output:

36187