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:
344 + 4107 + 9401 + 4490 - 5191 - 1753 - 5869 + 8385 - 7325

Ex Output:
-5901


Ex Input:
8513 - 7119 - 47

Ex Output:
15679


Ex Input:
6850 - 668 + 7176 + 9933 - 5989

Ex Output:

-3602