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:
573 - 2172 + 3067 + 6526 - 4690

Ex Output:
-2158


Ex Input:
8610 - 1799 + 6949 - 2118 + 2200 + 7263 + 3601 - 9571 - 1914

Ex Output:
3999


Ex Input:
1487 + 1407 + 4682 + 9727 + 9556

Ex Output:

-23885