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:
961 + 1754 - 8392 + 2659 - 495 + 358

Ex Output:
5077


Ex Input:
1462 + 1045 - 6631 - 4510 + 2234 + 4084 - 6610 + 2698

Ex Output:
9152


Ex Input:
4094 + 4708 - 4782 - 1107 - 3808 - 6920

Ex Output:

16003