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:
7555 + 8285 + 7132 + 9363 - 3515

Ex Output:
-13710


Ex Input:
4224 + 9155 + 116 - 5148 - 7166 - 7397 - 3883 - 2139

Ex Output:
20686


Ex Input:
6718 + 8544 - 9634 + 5660 - 9641 + 5595 + 8399

Ex Output:

-2205