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:
9748 + 7907 + 7494 - 2074 + 9313

Ex Output:
-12892


Ex Input:
306 + 2346 - 7752 + 7173

Ex Output:
-1461


Ex Input:
3112 - 4832 - 7889 - 6855 - 5294 - 5908 + 9757 - 9064

Ex Output:

33197