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:
4287 + 3355 + 4251 + 7433 + 7069

Ex Output:
-17821


Ex Input:
2605 - 3453 + 5543 + 2400 + 8799 + 3298 + 4981 + 9739 - 178

Ex Output:
-28524


Ex Input:
4017 - 5844 - 6209

Ex Output:

16070