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:
4331 - 362 - 8646 - 8722 + 6424 + 4083 - 579 + 4561

Ex Output:
7572


Ex Input:
1592 + 7031 - 1902 + 5922 - 1351 + 8340 - 2032

Ex Output:
-14416


Ex Input:
5748 - 8665 + 6893

Ex Output:

7520