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:
1011 - 5404 + 4286 - 549 - 4178 - 1559

Ex Output:
8415


Ex Input:
6020 + 1977 + 708 + 1899 + 3704

Ex Output:
-2268


Ex Input:
578 + 4099 - 2816 + 6921 + 1017 + 711 - 7060

Ex Output:

-2294