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:
694 + 4432 - 9053

Ex Output:
5315


Ex Input:
6817 + 2415 - 9368 - 2334

Ex Output:
16104


Ex Input:
3922 - 4821 - 1376

Ex Output:

10119