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:
1616 - 440 + 11

Ex Output:
2045


Ex Input:
1780 - 963 - 3786 - 8938 + 5127 + 4125 + 8911 + 9677

Ex Output:
-12373


Ex Input:
6780 - 9741 - 9986 - 1851 + 5881 + 2642

Ex Output:

19835