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

Ex Output:
-2531


Ex Input:
826 - 6501 - 223 + 9761 - 8863

Ex Output:
6652


Ex Input:
4956 - 4259 - 3459

Ex Output:

12674