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:
6020 + 1977 + 708 + 1899 + 3704

Ex Output:
-2268


Ex Input:
7581 + 8916 + 7584 + 7731

Ex Output:
-16650


Ex Input:
1341 + 633 + 9071

Ex Output:

-8363