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:
3583 - 967 - 3552 + 7898 - 1248 + 6992 - 5291 + 819

Ex Output:
-1068


Ex Input:
8839 + 4786 - 7068 + 5502 + 1623 - 1959 - 8567 + 3743 + 4578

Ex Output:
6201


Ex Input:
3346 + 2636 + 9474 + 5678 - 7410 - 8684 - 1573 - 5512

Ex Output:

8737