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:
2458 + 4195 - 6382

Ex Output:
4645


Ex Input:
7337 + 5801 - 8640 - 4143 - 2557

Ex Output:
16876


Ex Input:
6946 + 6834 - 1169 + 9756 + 2063 - 4750 - 425 + 1121 + 8155

Ex Output:

-14639