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:
8354 + 2602 + 1315

Ex Output:
4437


Ex Input:
569 + 2078 + 2757 - 9211

Ex Output:
4945


Ex Input:
5687 - 6841 - 8020 - 2451 + 6556 + 4714

Ex Output:

11729