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

Ex Output:
13626


Ex Input:
8802 - 6452 - 1721 - 4775 + 1838 + 4933 + 9964 - 6909

Ex Output:
11924


Ex Input:
7792 - 4040 + 623 + 5893 - 5289 - 5914 - 2437 + 3360 + 6102

Ex Output:

9494