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:
5709 + 8211 + 3945 + 1143 - 7258

Ex Output:
-332


Ex Input:
8625 - 7177 + 4191

Ex Output:
11611


Ex Input:
3010 - 5654 + 2849

Ex Output:

5815