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:
7646 + 8509 - 4372 - 9840 - 6377 - 2924 + 869

Ex Output:
21781


Ex Input:
7528 - 4788 + 7674 + 4839 + 6930 + 4883 + 9734

Ex Output:
-21744


Ex Input:
634 - 6766 - 1458 - 4376 + 9425

Ex Output:

3809