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:
3709 + 206 - 4363 + 3129 + 2506

Ex Output:
2231


Ex Input:
555 + 1174 + 4465 + 6452 + 3211 + 2960 - 856 + 4997 - 9930

Ex Output:
-11918


Ex Input:
9216 + 6460 - 9633 - 3547 - 1974 + 798

Ex Output:

17112