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:
556 + 5223 - 5888 + 4866

Ex Output:
-3645


Ex Input:
4224 + 9155 + 116 - 5148 - 7166 - 7397 - 3883 - 2139

Ex Output:
20686


Ex Input:
3365 - 8541 + 22 + 8518

Ex Output:

3366