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:
9982 + 267 - 3418 + 8741 - 63 - 1771 + 4720

Ex Output:
1506


Ex Input:
6694 + 8723 - 1592 + 7366 + 9388

Ex Output:
-17191


Ex Input:
464 - 3771 - 5840 + 227 + 4973 + 6767 - 8011

Ex Output:

6119