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:
4854 - 3903 - 3601 - 6666 - 170 - 3411 - 1306

Ex Output:
23911


Ex Input:
5000 + 8474 - 7071 - 6976 + 6373 - 466

Ex Output:
4666


Ex Input:
5298 + 3272 + 954 - 3109 - 9946 - 20 - 8515 + 2474 + 7805

Ex Output:

12383