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

Ex Output:
-6337


Ex Input:
4224 + 9155 + 116 - 5148 - 7166 - 7397 - 3883 - 2139

Ex Output:
20686


Ex Input:
3270 - 8853 - 7525 - 9255

Ex Output:

28903