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:
5945 + 1046 + 9187 + 929

Ex Output:
-5217


Ex Input:
957 + 7239 + 9500 - 6530 - 3766 - 6275 - 953

Ex Output:

1742