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:
178 + 5236 - 8372 - 6825 + 1044 - 7818 - 4765 + 7418

Ex Output:
14260


Ex Input:
7337 + 5801 - 8640 - 4143 - 2557

Ex Output:
16876


Ex Input:
2717 + 1922 + 449

Ex Output:

346