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:
6091 - 9741 + 8943 + 4033 - 2984 + 4984 + 8503

Ex Output:
-7647


Ex Input:
812 + 6106 - 2904 + 7738 + 7655 - 6987

Ex Output:
-10796


Ex Input:
8562 - 866 - 2825 - 4957 + 1628 - 9462

Ex Output:

25044