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:
9447 - 88 - 9606 - 2754

Ex Output:
21895


Ex Input:
8213 + 7145 + 5203 - 2621 + 1654 - 1844

Ex Output:
-1324


Ex Input:
2522 - 9497 + 996 + 3658 - 5629 + 8602

Ex Output:

4392