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:
1837 - 6362 - 226

Ex Output:
8425


Ex Input:
171 - 966 + 1234 - 1722 - 4406 + 9773 - 1161

Ex Output:
-2581


Ex Input:
2935 + 1467 + 5772 + 8207 + 3148 + 5629 - 4340 - 3089

Ex Output:

-13859