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:
4264 - 4438 + 3871 + 7585 - 540 - 3455 - 6016

Ex Output:
7257


Ex Input:
2306 - 650 - 3209

Ex Output:
6165


Ex Input:
9946 + 2189 - 4384 + 5083 + 7748 + 4357

Ex Output:

-5047