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:
9808 + 7071 + 9458 - 8326 - 6406 - 6771 - 1321 + 4712

Ex Output:
11391


Ex Input:
2500 + 3268 - 574 + 5695 - 2143 + 404 - 196

Ex Output:
-3954


Ex Input:
2204 - 9533 - 5453

Ex Output:

17190