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:
7646 + 8509 - 4372 - 9840 - 6377 - 2924 + 869

Ex Output:
21781


Ex Input:
4095 - 9640 - 5113 - 9355

Ex Output:
28203


Ex Input:
3248 - 3556 - 3059

Ex Output:

9863