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:
1589 + 4479 - 6111 - 3158 - 7662

Ex Output:
14041


Ex Input:
4284 - 8233 + 2781 - 2769 - 5560 + 635 - 1706 + 1965 + 6794

Ex Output:
10377


Ex Input:
5028 - 6077 - 3832 - 6952 + 3572 - 2081 + 570

Ex Output:

19828