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:
8403 + 1868 + 5827 + 5471 - 3746 + 1027 - 5777

Ex Output:
3733


Ex Input:
1137 - 2413 - 5470 - 9797 + 2566

Ex Output:
16251


Ex Input:
6261 + 9491 + 3830 + 9360 - 9515 - 9008 - 779 - 6816 - 3969

Ex Output:

13667