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:
3561 + 2090 - 1286 - 2259 - 7069 + 5058

Ex Output:
7027


Ex Input:
6666 + 4068 + 1057 + 5398 + 7947

Ex Output:
-11804


Ex Input:
158 - 3031 - 8943 + 7657 - 2929 - 4136 + 691 + 2988 - 9418

Ex Output:

17279


