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:
758 + 1664 + 5481 - 1654 - 1804 + 5232 - 9130

Ex Output:
969


Ex Input:
8098 + 8922 - 9716 + 5360

Ex Output:
3532


Ex Input:
6900 + 2584 - 6980 - 4270 + 3807 + 5629 - 5854

Ex Output:

11984