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:
5270 - 8957 + 6318 - 3390

Ex Output:
11299


Ex Input:
6091 - 9741 + 8943 + 4033 - 2984 + 4984 + 8503

Ex Output:
-7647


Ex Input:
1966 - 9308 + 6238 - 5366 - 1714 - 9389 + 7591 - 7165

Ex Output:

21079