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:
2982 + 9912 - 1386 + 7183 + 259 - 2370

Ex Output:
-10616


Ex Input:
2776 - 8931 + 2788 + 8315 - 6570 + 8385 - 2789

Ex Output:
1578


Ex Input:
7934 + 9296 + 4512 + 6875 + 3005

Ex Output:

-15754