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:
5462 - 3916 + 9462 - 8867 - 7357

Ex Output:
16140


Ex Input:
3719 - 4138 - 7321 - 9097 + 4558 + 9667 + 1909 + 647 - 6132

Ex Output:
13626


Ex Input:
8805 - 6896 + 7685

Ex Output:

8016