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:
2269 + 7840 - 467 - 5626

Ex Output:
522


Ex Input:
8625 - 7177 + 4191

Ex Output:
11611


Ex Input:
1586 + 3233 + 855 - 8353 + 9089 + 6347 - 6880 - 6557 - 6279

Ex Output:

10131