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:
6485 + 8165 + 4482 - 4771 + 2626 + 5500 + 8702 - 1649 + 7002

Ex Output:
-23572


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

Ex Output:
-14416


Ex Input:
2888 + 6515 + 957

Ex Output:

-4584