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:
2537 - 3199 + 5925 + 8172 + 3564 + 8810

Ex Output:
-20735


Ex Input:
5856 - 8885 - 8510 + 7879 + 2100

Ex Output:
13272


Ex Input:
300 - 9340 - 2878 + 8398

Ex Output:

4120