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:
6439 - 6685 + 6156 - 3314 + 6845 - 6872

Ex Output:
10309


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

Ex Output:
-6337


Ex Input:
352 + 1462 + 4915 + 1754 - 5550 - 9320 - 7432 + 5565 - 5716

Ex Output:

14674