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:
808 - 4935 + 288 + 9758 + 8690 + 384 + 4674 + 5769 - 8736

Ex Output:
-15084


Ex Input:
7053 - 797 + 1011 - 43 - 2798 - 1572 - 4498

Ex Output:
15750


Ex Input:
9136 - 2419 - 7815 - 6152 - 9028 + 1782 - 4683

Ex Output:

37451