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:
7320 + 9337 - 31 + 8850 + 4804 + 230 - 9287 - 4572

Ex Output:
-2011


Ex Input:
1320 + 3923 - 1080 - 3521 - 8998 + 4479 - 2559 - 7680

Ex Output:
16756


Ex Input:
9126 - 3783 + 1907 + 3225 + 6618 + 402 + 1433

Ex Output:

-676