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:
5162 - 4324 - 8160 + 9296 - 1881

Ex Output:
10231


Ex Input:
8552 - 1559 - 9197 - 2232

Ex Output:
21540


Ex Input:
871 + 3049 + 4185 - 5209 + 5352

Ex Output:

-6506