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:
8610 - 1799 + 6949 - 2118 + 2200 + 7263 + 3601 - 9571 - 1914

Ex Output:
3999


Ex Input:
7646 + 8509 - 4372 - 9840 - 6377 - 2924 + 869

Ex Output:
21781


Ex Input:
1471 + 8621 + 2292 + 3564 + 5489

Ex Output:

-18495