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:
4148 + 9216 - 5756 - 5558 + 2801 - 7501 + 1939 + 3102 + 6894

Ex Output:
-989


Ex Input:
9689 - 3967 - 2592 - 3020 - 6589

Ex Output:
25857


Ex Input:
9234 + 5883 - 2303 - 6555 + 8322 + 2831 - 4928

Ex Output:

5984