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:
4331 - 362 - 8646 - 8722 + 6424 + 4083 - 579 + 4561

Ex Output:
7572


Ex Input:
9096 - 7913 + 7375 + 7790

Ex Output:
1844


Ex Input:
337 + 7588 + 7432

Ex Output:

-14683