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:
5355 + 1451 - 3895 + 6213 + 743

Ex Output:
843


Ex Input:
344 - 7553 + 7224 + 1616 + 672 + 916

Ex Output:
-2531


Ex Input:
8691 - 4887 + 5896 - 464 - 6791 + 2783

Ex Output:

12154