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:
2167 - 8760 - 4771 - 8633 + 7929 + 9784 + 6892

Ex Output:
-274


Ex Input:
8739 - 8064 - 7000 + 6709

Ex Output:
17094


Ex Input:
8339 + 6847 - 6835 + 5124 + 238 - 5989 - 7694 + 9483 - 8124

Ex Output:

15289