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:
5127 + 1503 + 9610 + 3348

Ex Output:
-9334


Ex Input:
5321 - 5114 + 7476 + 1962

Ex Output:
997


Ex Input:
3682 - 9217 + 1573 + 3973 + 1936 - 7895 + 499

Ex Output:

12813