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:
3384 - 2434 - 5567

Ex Output:
11385


Ex Input:
1649 + 4642 + 613 - 7051 - 8575

Ex Output:
12020


Ex Input:
559 + 3907 + 666

Ex Output:

-4014