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:
4624 + 1072 + 9261 + 232 - 7837

Ex Output:
1896


Ex Input:
4226 - 3951 + 2613

Ex Output:
5564


Ex Input:
8441 + 7713 - 9394 + 2405 + 9325 - 5771 + 5567

Ex Output:

-1404