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:
5462 - 3916 + 9462 - 8867 - 7357

Ex Output:
16140


Ex Input:
4303 + 4581 + 3027 - 9269 + 3325

Ex Output:
2639


Ex Input:
1765 - 7677 + 9959 + 5336 - 2748

Ex Output:

-3105