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:
2349 - 9730 - 8231 + 6983 + 9097 + 6965 - 2760

Ex Output:
25


Ex Input:
4604 - 7073 - 6759 + 1372

Ex Output:

17064